In this blog post, you can test your knowledge about Z-test, Z-statistics and related concepts through multiple choice questions (MCQs) and answers. Getting a good understanding of Z-tests, Z-statistics and Z-distribution is of utmost importance for data scientists at large. The following are key concepts around which the MCQs are posted:

- Z-score or Z-statistics concepts
- Estimation of population mean and proportion
- 1-sample Z-test for mean and proportion
- 2-samples Z-test for mean and proportion

## Z-test Interview Questions Samples

The following is a list of interview questions that you would want to learn:

- What is Z-score? Explain with an example and formula.
- What are different types of Z-tests? Explain with formula and examples.
- What is difference between 1-sample and 2-samples Z-test for means? Explain with one example each and formula.Â
- What is difference between 1-sample and 2-samples Z-test for proportions? Explain with one example each and formula.
- How do you estimate population mean at 95% confidence interval as a function of Z-score?
- How do you estimate population proportion at 95% confidence interval as a function of Z-score?
- What is standard error? How is it related to margin of error?
- When to use Z-test and when to use T-test?
- What is sampling distribution and how is it related to Z-test and Z-statistics?
- What is Z-distribution? How is this different from T-distribution?
- What is standard score?Â
- How can Z-score be used to compare marks of two students in different classes?

## Z-test MCQs Quiz: Questions & Answers

The following is a list of questions and answers aimed to test your knowledge of different types of Z-tests, Z-statistics, hypothesis testing etc.

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```### #1. Standard error is _________ divided by the square root of ________?

### #2. ______ is used when population standard deviation is unknown and the sample size is small?

### #3. Z-test can be used to perform hypothesis testing related to sample ________?

### #4. Z-statistics can be used to estimate ________ mean?

### #5. Z-score is used when _________ standard deviation is known?

### #6. Z-test can be used for __________?

### #7. Standard error is _________ divided by the square root of ________?

### #8. Estimating population mean with 95% confidence interval would mean the value of Z-score to be _______

### #9. _______ will be used for estimating population mean for sample size greater than 30

### #10. 2-sample Z-test can be used to perform hypothesis testing for ________?

### #11. Estimating population mean with 95% confidence interval would mean the value of Z-score to be _______

### #12. Standard error is the ___________ of the ___________ in the sampling distribution?

### #13. 1-sample Z-test can be used to perform hypothesis testing for ________?

### #14. Estimating population mean with 95% confidence interval given a sample size of 10 would mean the value of T-score to be _______

### #15. Margin of error can be defined as the function of ________

### #16. Estimating population mean with 95% confidence interval given a sample size of 10 would mean the value of T-score to be _______

### #17. Z-statistics can be used to estimate ________ proportion?

### #18. 1-sample Z-test can be used to perform hypothesis testing for ________?

### #19. Standard error is _________ divided by the square root of ________?

### #20. ______ is used when population standard deviation is unknown and the sample size is small?

### #21. Z-statistics can be used to estimate ________ mean?

### #22. Margin of error can be defined as the function of ________

### #23. Z-statistics can be used to estimate ________ proportion?

### #24. _______ will be used for estimating population mean for sample size lesser than 30

### #25. Z-score is used when _________ standard deviation is known?

### #26. _______ will be used for estimating population mean for sample size lesser than 30

### #27. Margin of error can be defined as the function of ________

### #28. _______ can be used for hypothesis testing when the sample size is larger than 30

### #29. Z-test can be used to perform hypothesis testing related to sample ________?

### #30. 2-sample Z-test can be used to perform hypothesis testing for ________?

### #31. _______ can be used for hypothesis testing when the sample size is larger than 30

### #32. Standard error is the ___________ of the ___________ in the sampling distribution?

### #33. Standard error is the ___________ of the ___________ in the sampling distribution?

### #34. _______ will be used for estimating population mean for sample size greater than 30

### #35. Z-test can be used for __________?

### #36. Z-score is used when _________ standard deviation is known?

## Results

Congratulations! You passed the test!
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