statistics MCQs – Page 25

Practise multiple-choice questions from statistics for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

481. Binomial distribution has parameters:______________?
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A. Two

B. Four

C. One

D. None

E. Three

482. If y= ax + b the S.D. of y is _______________?
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A. Minimum

B. Mean Deviation of x

C. S.D. of x

D. Maximum

483. If n = 400 and P=.69 then 90% C.I for P is _________________?
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A. .314 and .652

B. .798 and .745

C. None of these

D. 652 and . 728
484. Relative measure of skewness was introduced by _____________?
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A. Mode

B. Lack

C. Karl Person

D. Rowely

485. 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. Minimal sufficient statistic

B. Minimax statistics

C. Efficient

D. Sufficient statistic

486. If we reject the null hypothesis, we might be making____________?
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A. Unpredictable

B. A correct Decision

C. Type-II Error

D. Type-Error

487. Which of the following is not a requirement for binomial distribution ?
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A. Equally likely outcomes

B. A fixed number of trials

C. Constant Probability of Success

D. Only two possible outcomes

488. If y = bx + a the mean deviation of y is_____________?
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A. S.D. of y

B. M.D.of x

C. S.D. of x

D. var (x)

489. Consistency of an estimator can be checked by comparing____________?
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A. mean Square Error

B. Variance

C. Mean

D. Standard Deviation

490. The binomial distribution is positively skewed when:________________?
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A. p > q

B. p < q

C. p = q

D. both (a) and (b

491. An Index Number calculated for more than one items is called ___________?
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A. Consumer Index Number

B. Chain Indices

C. Simple Aggregation 1. Number

D. Sensitive Price Index number

492. When testing for randomness, we can use_____________?
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A. None of these

B. Runs test

C. D Mann-Whitney U test

D. Sign test

493. The variance of binomial distribution is always:________________?
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A. Equal to standard deviation

B. None of these

C. Equal to mean

D. Greater than mean

E. Less than mean
494. In binomial experiment, the successive trials are _____________?
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A. Dependent

B. Related

C. constant

D. independent
495. Sample variance S2 is unbiased estimator of population variance 26 because ________________?
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A. E(u) = X

B. Ux = u

C. E(S2) = s2

D. E(P) = P
496. The index number of base period is always:_______________?
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A. 200

B. None of these

C. The price of that year

D. 100
497. The hypothesis which is being tested is called ___________________?
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A. Composite hypothesis

B. Alternative hypothesis

C. Simple hypothesis

D. Null hypothesis
498. __________ deviation taken from A.M. is always equal to zero?
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A. Sum

B. Average

C. 2.D.

D. Mean

499. Binomial distribution is symmetrical when P=_________________?
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A. 1

B. 2q

C. 1/q

D. q
500. If all values are same then the measure of dispersion will be?
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A. Mean

B. 1

C. Mode

D. 0

E. Median