Statistics

11. A chi-square goodness-of-fit test has k categories. The degrees of freedom are:

• A k
• B k – 1 Correct answer
• C k – 2
• D k * 2

12. Which test is most appropriate for comparing an observed empirical cumulative distribution function with a continuous theoretical CDF?

• A Chi-Square goodness of fit
• B Kolmogorov-Smirnov test Correct answer
• C Mann-Whitney U test
• D Sign test

13. Non-parametric tests are also known as:

• A Distribution-free tests Correct answer
• B Parametric-free tests
• C Continuous tests
• D Normal-assumption tests

14. Which test statistic is used in ANOVA?

• A Z-statistic
• B t-statistic
• C F-statistic Correct answer
• D Chi-Square

15. The Sign test is based on which of the following?

• A Ranks of the values
• B The signs (+ or -) of the differences Correct answer
• C Exact values of mean
• D Squared deviations

16. In a Completely Randomized Design (CRD), randomization is applied to:

• A Treatments only
• B Experimental units only
• C Both treatments and experimental units Correct answer
• D Blocks only

17. McNemar's test is used for analyzing:

• A Independent nominal data
• B Paired nominal data (2×2 contingency table) Correct answer
• C Continuous ranked data
• D Log-linear data

18. A Randomized Complete Block Design (RCBD) is used to control variation in:

• A One direction (one-way blocking) Correct answer
• B Two directions (two-way blocking)
• C Three directions
• D No directions

19. The Wilcoxon rank-sum test statistic is computed using:

• A Frequencies of positive changes
• B Ranks of the combined sample observations Correct answer
• C The absolute differences
• D Standard errors

20. A Latin Square Design (LSD) controls variation in:

• A One direction
• B Two perpendicular directions (rows and columns) Correct answer
• C Three directions
• D None of these