# STATA Interview Questions And Answers [ FRESHERS ]

Last updated on 14th Nov 2021, Blog, Interview Questions

Stata is a powerful statistical software that enables users to analyze, manage, and produce graphical visualizations of data. If you’re attending for STATA Interview Questions for Expert or Novices, you are in right place. There are a lot of opportunities from many reputed companies in the world. According to analysis, the average salary for STATA is approximately $69,870 pa. So, You still can move ahead in your job in STATA. ACTE offers Advanced STATA Interview Questions that supports you in cracking your interview & getting the desired occupation as STATA Analyst.

**1. List down standard methods and advanced techniques provided by the STATA program? **

**Ans:**

Standard methods | Advanced |
---|---|

Basic tabulations and summaries | Time-series smoothers |

Multilevel models | Binary, count, and censored outcomes |

Case-control analysis | Contrasts and comparisons |

Dynamic panel-data (DPD) regressions | Multiple imputations |

** 2. What is the Stata file? **

**Ans:**

The Stata_dta format (with extension . dta) is a proprietary binary format designed for use as the native format for datasets with Stata, a system for statistics and data analysis. Stata 1.0 was released in 1985 for the IBM PC. Stata is now available for Windows, Mac OS, and Unix.

** 3. Explain describe and codebook commands?**

**Ans:**

Describe | Codebook |
---|---|

Describe command is the most basic form of a command. | Codebook drafts a detailed description of each variable. |

It projects a short description of the file and also lists variables and their required information in the datasets. | By default, the codebook command will list variables that have nine or fewer discrete values and means for those which are more than nine. |

**4. How to learn to perform path analysis in STATA?**

**Ans:**

** 5. Which is easier, Stata or R? **

**Ans:**

The Stata is easier to learn than R. It is because learning software is easy as compared to learning a programming language. For users, Stata also offers community. And in the Stata community, you can learn Stata with the help of some experts

**6. How do you export Stata to CSV?**

**Ans:**

*type smauto2.csv*

In Excel, you would choose file then open and then for files of type select comma separated file (Excel expects those files to have a . csv extension). You can then click the file and open it in Excel. You can learn more about this by seeing the Stata help file for outsheet.

**7. Is Stata a paid software?**

**Ans:**

Single user

A single-user license for Stata is an identified-user license. … Single user licenses may be either annual or perpetual. Annual licenses. An annual license entitles you to receive updates and new releases to Stata software throughout your license term, all at no additional cost.

** 8. What does CD mean in Stata?**

**Ans:**

current working directory.

Stata for Windows: cd changes the current working directory to the specified drive and directory. pwd is equivalent to typing cd without arguments; both display the name of the current working directory.

**9. What does float mean in Stata?**

**Ans:**

Float is a storage format used by Stata, not a computation format. When you have a number stored as a float and you make a calculation, such as . gen newvar = sqrt(oldvar)/sqrt(2) oldvar is retrieved and is promoted to a double.

**10. What is storage type double Stata?**

**Ans:**

Storage Types in Stata

Float and double are the two that can hold non-integer numbers (decimals) and are the most common.

**11. What is _N and _n in Stata?**

**Ans:**

Stata has two built-in variables called _n and _N. _n is Stata notation for the current observation number. _N is Stata notation for the total number of observations.

**12. What is statistical analysis data?**

**Ans:**

**13. What does != Mean in Stata? **

**Ans:**

In Stata, these expressions use one or more various relational and logical operators. The operators ==, ~=, != , >, >=, <, and <= are used to test equality or inequality. The operators & | ~ and ! are used to indicate "and", "or", and "not". It is a matter of taste whether you use ~ or ! to indicate negation.

**14. What does IB mean in Stata?**

**Ans:**

By default the first (smallest) value will be used as a reference category; there is an ib operator to indicate other base values. regress inform urb i.continent. 5 indicator variables, the first continent is the base category. regress inform urb ib2.continent. continent 2 is the base.

** 15. What does obs mean in Stata?**

**Ans:**

Increase the number of observations.

obs — Increase the number of observations in a dataset. Syntax.

**16. What does SS stand for in Stata?**

**Ans:**

SS – These are the Sum of Squares associated with the three sources of variance, Total, Model and Residual. These can be computed in many ways. Conceptually, these formulas can be expressed as: SSTotal The total variability around the mean.

**17. What are the functions of Stata?**

**Ans:**

Stata provides mathematical functions, probability and density functions, matrix functions, string functions, functions for dealing with dates and time series, and a set of special functions for programmers. You can find all of these documented in the Stata Functions Reference Manual.

**18. What is Stata used for? **

**Ans:**

Stata is a powerful statistical software that enables users to analyze, manage, and produce graphical visualizations of data. It is primarily used by researchers in the fields of economics, biomedicine, and political science to examine data patterns.

**19. What is the difference between Stata and SPSS?**

**Ans:**

Unlike Stata, SPSS is ideal for modeling very complex data. Stata allows for normal analysis procedures, while SPSS is ideal for large amounts of data and multivariate analysis. SPSS is the better choice for social and medical science fields, as opposed to econometrics. Stata is more suited for research and analysis.

**20. What does Stata stand for?**

**Ans:**

The name Stata is a syllabic abbreviation of the words statistics and data.

**21. Is python similar to Stata?**

**Ans:**

Coding in Python is a little different than coding in Stata. In Stata, you have one dataset in memory. Everything in Stata is built around this paradigm. Python is a general purpose programming language where a “variable” is not a column of data.

**22. Is Stata better than R?**

**Ans:**

Stata is well-designed and it makes it easy to perform simple analyses but Stata becomes more cumbersome when you want to program a non-standard task. R on the other hand requires a lot of basic skills before you can do even the simplest analysis but comes into its own for more complex tasks.

**23. What programming language is Stata?**

**Ans:**

Stata even lets you incorporate C, C++, and Java plugins in your Stata programs via a native API for each language.

**24. Is Stata harder than SPSS? **

**Ans:**

SPSS is mainly used for complex data management like the familiar excel spreadsheet. Stata is useful in cutting edge research and ideal for developers or researchers. SPSS is a bit stronger in this area. Stata is relatively weak in this area.

**25. Is Stata coding?**

**Ans:**

Programming Stata is easy. Stata has two programming languages. One, known informally as “ado”, is based on Stata’s commands. You can write scripts and programs to create reproducible analyses.

**26. Describe the new in STATA**

**Ans:**

**27. What does Minitab stand for? **

**Ans:**

statistical analysis software

Minitab is statistical analysis software. It can be used for learning about statistics as well as statistical research. Statistical analysis computer applications have the advantage of being accurate, reliable, and generally faster than computing statistics and drawing graphs by hand.

**28. Do economists use Stata or R?**

**Ans:**

In academia for economics, Stata is the standard. Most economists trust the results of the program and never justify their results; that’s Stata’s job is the general mindset I’ve observed.

**29. What are macros in Stata?**

**Ans:**

A Stata macro is a box you put text in. You then use what’s in the box in subsequent commands. (The real trick is getting a single command to run multiple times with a different bit of text in the box each time–we’ll get there). The macros we’ll use are “local” macros.

**30. Is Stata open source? **

**Ans:**

Stata is popular in the social sciences, particularly economics and political science. Stata is not free to have on your personal computer. Unlike an open-source program, you cannot program your own functions into Stata, so you are limited to the functions it already supports.

**31. Is Stata used in industry?**

**Ans:**

The companies using Stata are most often found in the United States and in the Higher Education industry. Stata is most often used by companies with 1000-5000 employees and >1000M dollars in revenue. Our data for Stata usage goes back as far as 1 years and 8 months.

**32. What can Stata be used for?**

**Ans:**

Stata is a powerful statistical software that enables users to analyze, manage, and produce graphical visualizations of data. It is primarily used by researchers in the fields of economics, biomedicine, and political science to examine data patterns.

**33. How long does it take to get Stata?**

**Ans:**

Software is delivered electronically when possible. Download instructions and license information are sent after the order is processed, typically within one day of order receipt.

**34. Can Stata open a csv file?**

**Ans:**

Stata can read data in several other formats. A standard format is a comma-separated values file with extension . csv (which can be created by Excel for example). This is similar to using Excel.

**35. Is Stata good for big data?**

**Ans:**

Stata allows you to process datasets containing more than 2 billion observations if you have a big computer, and by big, we mean 512 GB or more of memory. Stata stores your data in memory. That makes Stata fast. It also means that datasets you wish to process must fit in memory.

**36. Define three dimensional analysis of STATA **

**Ans:**

**37. Which is better: Stata or eviews?**

**Ans:**

Both EVIEWS and STATA are useful in estimating panel data analysis. However, eviews is easier to use, while STATA gives you diversified modeling options. STATA is better relative to Eviews since the software allows you to use the majority of second-generation panel approaches.

**38. What is global in Stata?**

**Ans:**

A macro in Stata begins with the word “global” or “local”. The command global tells Stata to store everything in the command line in its memory until you exit Stata. If you open another data set before exiting, the global macro will still be in memory.

**39. What are the different reasons for using Stata explain your answer?**

**Ans:**

- Master your data.
- Broad suite of statistical features.
- Publication-quality graphics.
- Automated reporting.
- Truly reproducible research.
- PyStata – Python integration.

Stata is a complete, integrated software package that provides all your data science needs—data manipulation, visualization, statistics, and automated reporting.

**40. What is a scalar in Stata?**

**Ans:**

Stata scalars are named entities that store single numbers or strings, which may include missing values.

**41. What is the global macro in Stata?**

**Ans:**

In Stata, a global macro is something that is stored in memory and can be used anytime during a Stata session by reference to its name (a local macro differs basically inasmuch it can be used only within a circumscribed piece of a program or a do-file).

**42. What is Stata good for?**

**Ans:**

Stata is a powerful statistical software that enables users to analyze, manage, and produce graphical visualizations of data. It is primarily used by researchers in the fields of economics, biomedicine, and political science to examine data patterns.

**43. Is Stata faster than R?**

**Ans:**

While Stata took 67.25 seconds to write a file of 458MB of raw text, R needed 5.7 seconds more to do the same (72.93 seconds). Therefore, Stata the data 8% faster than R did. While Stata took 118.35 seconds, R took only 42.53 seconds.

**44. Is Stata better than SPSS?**

**Ans:**

Stata allows for normal analysis procedures, while SPSS is ideal for large amounts of data and multivariate analysis. SPSS is the better choice for social and medical science fields, as opposed to econometrics. … In other words, SPSS is best for complex data management. Stata is more suited for research and analysis.

** 45. Can you upgrade Stata?**

**Ans:**

Start the installer by double-clicking on Stata17.

Check the edition of Stata you are upgrading to. Confirm the edition you check matches the edition on your License and Activation Key. Click on Continue. During installation of the new edition, Stata’s license file, stata.

**46. How do I import Excel into Stata? **

**Ans:**

Stata can directly import data from Excel (both . xls and . xlsx) files. Select File > Import > Excel Spreadsheet from Stata’s menus.

**47. How do you implement STATA code to calculate commuting time?**

**Ans:**

**48. What file format does Stata use? **

**Ans:**

The Stata_dta format (with extension . dta) is a proprietary binary format designed for use as the native format for datasets with Stata, a system for statistics and data analysis. Stata 1.0 was released in 1985 for the IBM PC. Stata is now available for Windows, Mac OS, and Unix.

**49. How do I open a Stata file in Excel?**

**Ans:**

The simple solution is to open the . dta file in Stata and then export it as an Excel sheet or CSV file (File >> Export >> Excel spreadsheet). It should do the trick.

**50. How much RAM does Stata use?**

**Ans:**

You need at least 1 GB of RAM for Stata to run smoothly. Stata loads all of your data into RAM to perform its calculations. You must have enough physical RAM to load Stata and allocate enough memory to it to load and analyze your data sets.

**51. Is Python better than Stata?**

**Ans:**

Python and R are superior to every aspect of Stata – but it’s a very good starting program for students. on a) There are many econometric approaches specific to a certain field for which packages have been developed for R and Stata, but not (yet) for Python.

**52. What are Stata macros?**

**Ans:**

A Stata macro is a box you put text in. You then use what’s in the box in subsequent commands. (The real trick is getting a single command to run multiple times with a different bit of text in the box each time–we’ll get there). The macros we’ll use are “local” macros.

**53. What does r mean in Stata?**

**Ans:**

Notice that instead of using the actual value of the mean of read in this command, we used the name of the returned result (i.e. r(mean)), Stata knows when it sees r(mean) that we actually mean the value stored in that system variable. This is because Stata uses the r(…) as a placeholder for a real value.

**54. What does the scalar command in Stata do?**

**Ans:**

scalar define defines the contents of the scalar variable scalar name. The expression may be either a numeric or a string expression. String scalars can hold arbitrarily long strings, even longer than macros, and unlike macros, can also hold binary data. scalar dir and scalar list both list the contents of scalars.

**55. What is Tokenize Stata?**

**Ans:**

Description. tokenize divides string into tokens, storing the result in ‘1’, ‘2’, (the positional local macros). Tokens are determined based on the parsing characters pchars, which default to a space if not specified.

**56. What is Stata Varlist?**

**Ans:**

The by varlist: prefix causes Stata to repeat a command for each subset of the data for which the values of the variables in varlist are equal.

**57. What is importing binary files for STATA?**

**Ans:**

**58. Who uses Stata?**

**Ans:**

**59. What is exp in Stata?**

**Ans:**

Description. exp(Z) returns the element wise exponentiation of Z. exp() returns real if Z is real and complex if Z is complex. ln(Z) and log(Z) return the element wise natural logarithm of Z. The functions are synonyms.

**60. Where does Stata export to? **

**Ans:**

Stata: Data Analysis and Statistical Software.

Stata for Windows, Mac, and Linux can directly import data and export data and results to Microsoft Excel files. Both Excel . xls and . xlsx files are supported.

**61. How do I export from Stata to Word?**

**Ans:**

Highlight the output you want to save, then use the pulldown menu to choose Edit and then Copy as Picture. This is illustrated below. You can then go to Microsoft Word and from its pulldown menu choose Edit then Paste.

**62. Why is my data red in Stata? **

**Ans:**

It’s a common mistake when importing data to accidentally make Stata think a numeric variable is a string. The values of string variables are red in the data browser (like make in this data set) so if you start seeing red where you shouldn’t you know you’ve got a problem.

**63. How do you make a file in Stata?**

**Ans:**

To create a do file on a Mac, click on File, then on New, then on Do File in the Stata window. Alternatively, you can click on the “Do-file Editor” icon in the Stata window. A new window will appear: This blank text document is your do file.

**64. What are string variables in Stata?**

**Ans:**

String variables, simply speaking, are variables that contain not just numbers, but also other characters (possibly mixed with numbers). … But actually a string variable may contain characters such as “\” or “-” or “:” and so on — anything a keyboard may produce

** 65. Does Stata count as a programming language?**

**Ans:**

Programming Stata is easy. Stata has two programming languages. One, known informally as “ado”, is based on Stata’s commands. You can write scripts and programs to create reproducible analyses

**66. What are DTA files?**

**Ans:**

A DTA file is a database file used by IWIS Chain Engineering, an automobile drive chain calculation program. It contains data, which may include the engine torque, chain load, and friction supported by the drive chain dta, which is the system database, and IW. dta, which is the chain database.

**67. Explain the Stata features and review 2021?**

**Ans:**

**68. Why is Stata so slow?**

**Ans:**

Stata is using more memory than is physically available on your computer. A clear indicator is constant, prolonged disk access during the execution of a command. Possible solutions include adding more memory to your computer or moving to a 64-bit machine.

**69. What does * do in Stata?**

**Ans:**

* is used to duplicate a string 0 or more times. Stata determines by context whether * means multiplication or string duplication. If * appears between two numeric values, Stata multiplies them.

**70. What does Ln mean in Stata? **

**Ans:**

- natural log

- In Stata, ln(x)=log(x), in other words, log(x) defaults to natural log instead of log base 10. If you want log base 10, use log10(x).

**71. What does D mean in Stata? **

**Ans:**

For panel data, if you use “d. variable” in Stata, it will create a missing value at the start of each cross-section (As N=26, so it will create 26 missing values). But if you take the first difference in excel, of course, it will only generate missing value only at the start.

**72. Do files in Stata?**

**Ans:**

The do-file contains the Stata commands that you wish to execute. Executing a do-file is the same as executing a series of commands interactively, only you have a permanent record of your commands. This allows you to quickly reproduce work you have already done and go from there.

**73. What is #delimit in Stata? **

**Ans:**

The #delimit command resets the character that marks the end of a command. It can be used only in do-files or ado-files. Remarks and examples. stata.com. #delimit (pronounced pound-delimit) is a Stata preprocessor command.

**74. What is a byte in Stata?**

**Ans:**

Here we can see that the storage type is listed as “byte.” Byte indicates that the variable is stored as an integer between -127 and 100. The default data storage type for Stata is “float.” By inquiring with Stata using the help command, we see that the float variable type is much larger relative to. byte:

**75. What is blue data in Stata?**

**Ans:**

Almost all the variables in this data set are in blue, meaning they have value labels. Some of these are like the value labels you saw before. For example, the sex variable has 1 labeled as “male” and 2 labeled as “female.” However, most of the value labels only label the missing values.

**76. What does encode mean in Stata?**

**Ans:**

Description. encode creates a new variable named newvar based on the string variable varname, creating, adding to, or just using (as necessary) the value label newvar or, if specified, name.

**77. Explain the network meta analysis in STATA?**

**Ans:**

**78. How much memory does Stata need?**

**Ans:**

RAM. The most important consideration when buying a computer on which to run Stata is the amount of RAM (memory) you will need. You need at least 1 GB of RAM for Stata to run smoothly. Stata loads all of your data into RAM to perform its calculations.

**79. What does == in Stata mean? **

**Ans:**

Double equal: Test for equality

The double equals, ==, is used to test for equality. It is sometimes called logical equals because it is part of a logical test that returns either a one (true) or a zero (false).

**80. What is exp required in Stata?**

**Ans:**

varlist required = exp required using required by() option required Certain commands require a varlist or another element of the language. The message specifies the required item that was missing from the command you gave. See the command’s syntax diagram. The message specifies which item in the command is not allowed.

**81. How do you write square roots in Stata?**

**Ans:**

- sqrt(a)—see [M-5] sqrt( )—calculates the (element-by-element) square root of a and returns the. Result:
- Most functions work like sqrt(), although many take more than one argument
- As another example, st view(V, i, j)—see [M-5] st view( )—creates a view onto the Stata dataset.

stata.com

**82. What is Numlist Stata?**

**Ans:**

Description. The numlist command expands the numeric list supplied as a string argument and performs error checking based on the options specified. Any numeric sequence operators in the numlist string are evaluated, and the expanded list of numbers is returned in r(numlist).

**83. Do shortcuts Stata?**

**Ans:**

Go to the start of the line (with the Home key) and then Shift + Up / Down . Above is assigned to Ctrl + Shift + Enter , but it could be any keyboard combination. I usually use Ctrl + Ö or Ctrl + Ä since I use a scandinavian keyboard.

**84. What does != Mean in Stata?**

**Ans:**

In Stata, these expressions use one or more various relational and logical operators. The operators ==, ~=, != , >, >=, <, and <= are used to test equality or inequality. The operators & | ~ and ! are used to indicate "and", "or", and "not". It is a matter of taste whether you use ~ or ! to indicate negation.

**85. What is a command in Stata?**

**Ans:**

Stata command syntax refers to the rules that need to be followed when we want to interact with a software, just like we follow grammar rules when speaking in a language.

**86. What is Insheet Stata?**

**Ans:**

The insheet command works equally well on files which use tabs as separators. Stata examines the file and determines whether commas or tabs are being used as separators and reads the file appropriately. Now that the file has been read into Stata, you can save it with the save command (we will skip doing that step).

**87. What is the contribution of stata**

**Ans:**

**88. Where can I find Stata data?**

**Ans:**

The data is available from the INEGI website. The National Council for the Evaluation of Social Development Policy (CONEVAL) provides the Stata programs for the computations corresponding to reports on the rural and urban poverty estimation on their website.

**89. What does a group do in Stata?**

**Ans:**

The group’s command for tabulation is built around a call to list. It has no particular limits on the number of identifiers (row, column, or other variables defining cells).

**90. What files can Stata open? **

**Ans:**

Stata can directly import data from Excel (both . xls and . xlsx) files.

**91. What does Bysort in Stata do? **

**Ans:**

By and bysort are really the same command; bysort is just by with the sort option. performs the generate by values of pid but first verifies that the data are sorted by pid and time within pid. sort specifies that if the data are not already sorted by varlist, by should sort them.

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**92. What is the architecture of web server components in STATA?**

**Ans:**