statistical inference MCQs – Page 4

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

statistical inference Mcqs
61. Which of the following is an assumption underlying the use of the t-distribution ?
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A. s (sample standard deviation) is an unbiased estimate of the population variance.

B. All above

C. The sample are drawn from a normally distributed population.

D. The variance of the population is known

62. Wilcoxon Rank-Sum test can be of_______________?
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A. Either of the above

B. Lower tailed

C. Upper tailed

D. None of the above

63. An alternative non parametric test of ANOVA?
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A. Median test

B. Sign test

C. Kruskal Wallis test

D. Wilcoxon sign rank test

64. We use non parametric tests when the data is_________?
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A. Qualitative

B. Ranked

C. Both a and b

D. None of these

65. Type II error is committed when the null hypothesis is _________________?
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A. Rejected when it is true

B. Accepted when it is false

C. Rejected when it is false

D. Accepted when it is true

66. In hypothesis testing probability of (alpha +beta) =1?
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A. Increase

B. No

C. Decrease

D. Yes

67. If the conditional distribution of X1,X2,..Xn given S=s, does not depends on ?, for any value of S=s the statistics S=s(X1,X2,..Xn) is called______________?
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A. Unbiased

B. Consistent

C. Efficient

D. Sufficient
68. __________ is the process of using sample information to reach?
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A. Increase

B. Biased

C. Unbiased

D. Population

69. Sample proportion P is __________ estimator?
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A. Parameter

B. Unbiased

C. None of these

D. Biased

70. A set of jointly sufficient statistic is defined to be minimal sufficient if and only if_______________?
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A. It is a function of every other set of sufficient

B. It is a function of any sufficient statistics in the set.

C. It is not a function of every other set of sufficient statistics.

D. It is a function of some other set of sufficient statistics.

71. Sampling Error decrease by _______ the sample size?
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A. Sampling

B. Population

C. Increase

D. Decrease

72. The Wilcoxon, Rank-Sum test used to compares_______________?
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A. Two populations

B. Three populations

C. A sample mean to the population mean

D. Any number of populations

73. 95% confidence limits for P are _________________?
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A. P1.96 p2q2/?n

B. P1.65(pq/n)

C. P1.96?p2q2/n

D. P2.18?p2q2/n