statistical inference MCQs – Page 2

Practise focused statistical inference questions with marked answers for exam preparation and subject revision.

statistical inference Mcqs
21. Analysis of Variance (ANOVA) is a test for equally of______________?
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A. Proportions

B. Only two parameters

C. Means

D. Variances
22. If Ho is stated as Q = Qo< the alternate hypothesis in general stated________________?
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A. Q ? Qo

B. None of these

C. Q Qo

23. ___________ is a value of sample statistics?
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A. Probability

B. Numerical

C. Estimator

D. Estimate
24. The level of significance is denoted by _________________?
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A. 1 ?

B. ?

C. ?

D. 1 ?

25. 1 ? is the probability of_____________?
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A. Type-I error

B. Type-II Error

C. Acceptance Region

D. Rejection Region

26. Which of the following is simple hypothesis___________________?
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A. u ? 20

B. u 20

C. u = 20
27. The Estimation and testing of hypothesis are main branches of ________________?
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A. Regression

B. Probability distribution

C. Statistical Inference

D. Sampling

28. If E(?)=?, then ? is said to be_______________?
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A. Unbiased

B. Consistent

C. Sufficient

D. Efficient

29. Herbicide A has been used for years in order to kill a particular type of weed. An experiment is to be conducted in order to see whether a new herbicide, Herbicide B, is more effective than Herbicide A. Herbicide A will continue to be used unless there is sufficient evidence that Herbicide B is more effective. The alternative hypothesis in this problem is_____________?
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A. Herbicide A is not more effective than Herbicide B

B. Herbicide B is not more effective than Herbicide A

C. Herbicide A is more effective than Herbicide B

D. Herbicide B is more effective than Herbicide A

30. if Var(?)?0 as n ? 0, then ? is said to be______________?
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A. Unbiased

B. Consistent

C. Efficient

D. Sufficient

31. Sample variance S2 is unbiased estimator of population variance 26 because ________________?
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A. E(S2) = s2

B. E(u) = X

C. E(P) = P

D. Ux = u

32. The t distribution are_____________?
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A. Same as Normal Curve

B. None of these

C. Skewed

D. Symmetrical
33. The Mann-Whitney U test is preferred to a t-test when____________?
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A. Data are paired

B. Sample are dependent

C. Sample sizes are small

D. The assumption of normality is not met
34. if Var(T2)_______________?
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A. Consistent

B. Sufficient

C. Unbiased

D. Efficient
35. Criteria to check a point estimator to be good are_____________?
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A. All Above

B. Efficiency

C. Unbiasedness

D. Consistency

36. The Runs test results in rejecting the null hypothesis of randomness when______________?
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A. None of these

B. Either of the above

C. There is an unusually small number of runs

D. There is an unusually large number of runs

37. Which of the following test is most likely assessing this null hypothesis: Ho The number of violations per apartment in the population of all city apartments is binomially distributed with a probability of success in any one trial of P=0.3 dd ?
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A. The Kolmogorove-Simirnor test

B. The Kruskal-Wallis test

C. The Wilcoxon Signed Rank test

D. The Mann-Whitney test

38. The first and starting point in test Hypothesis is ______________?
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A. stating Ho

B. stating H1

C. Test statistics

D. L of significance

39. Let X1,X2,Xn be a random sample from the density f(x;(?), where ? may be vector. If the conditional distribution of X1,X2,Xn given S=s does not depend on ? for any value of s of S, then statistic is called?
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A. Minimax statistics

B. Minimal sufficient statistic

C. Efficient

D. Sufficient statistic

40. Parameter is a _________ quantity?
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A. Constant

B. Non of these

C. All of above

D. Variable