UPSC Indian Statistical Service (ISS) MCQs

Q1. What is the mean of the data set: 2, 4, 6, 8, 10?

Q2. The variance of a data set measures:

Q3. The probability of an impossible event is:

Q4. Which distribution is called the "bell curve"?

Q5. Central Limit Theorem describes:

Q6. Which method is used for estimating population parameters from a sample?

Q7. If P(A) = 0.3 and P(B) = 0.4, and events A and B are mutually exclusive, what is P(A or B)?

Q8. The median is:

Q9. Which test is used to check independence between two categorical variables?

Q10. The null hypothesis in statistical testing is:

Q11. In regression analysis, the dependent variable is:

Q12. Which scale of measurement uses categories without order?

Q13. The purpose of hypothesis testing is to:

Q14. In probability, “independent events” mean:

Q15. Which graphical representation is best for showing distribution of a quantitative variable?

Q16. Time series analysis is used to:

Q17. Which of the following is a measure of central tendency?

Q18. “Sampling error” refers to:

Q19. Which is a non-parametric test?

Q20. The term “multicollinearity” is associated with:

Q21. Which distribution is used to model number of successes in fixed number of independent Bernoulli trials?

Q22. Which test is used to compare means of two independent samples?

Q23. What is the full form of “ANOVA”?

Q24. Which of these is a measure of dispersion?

Q25. Which data type does “ordinal” data represent?

Q26. In time series, “seasonal variation” means:

Q27. Which software is widely used for statistical analysis?

Q28. Which method is used to estimate population parameter from sample statistics?

Q29. Which is NOT a valid probability value?

Q30. What is the purpose of “Bayes Theorem”?

Q31. Sampling technique in which every element has equal chance of selection is:

Q32. What is the mode of the data set: 1, 2, 2, 3, 4?

Q33. What is heteroscedasticity in regression analysis?

Q34. Which of the following is a descriptive statistic?

Q35. Which test checks the goodness of fit?

Q36. Which is the measure of relationship strength between two variables?

Q37. Linear models assume:

Q38. In statistical inference, a Type I error is:

Q39. Which is NOT a measure of central tendency?

Q40. Which method is used to solve simultaneous linear equations?