statistics MCQs – Page 37

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 Review each marked answer and report any item that may be outdated or unclear.

721. The median of numbers, 12, 22, 32,__(2n + 1)2 is given by______?
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A. (n2 + 1)

B. (n + 1)2

C. (N 1)2

D. (2n + 1)2

722. If (Bxy>1)then (Byx)?
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A. No effect

B. Less than 1

C. Remain same

D. Greater than 1

723. Standard normal variable Z is___________?
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A. - x /?

B. x /?

C. x ?/

D. ? x/

724. If X N(16,49), the mean is___________?
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A. 7

B. 16

C. 4

D. 49

725. Frequency table is an arrangement of data by classes together with their _______ class frequencies?
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A. Terms

B. Same class

C. Alternate class

D. Corresponding class
726. The quartile deviation is ____ (S.D.) is normal dist?
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A. 0.4567

B. .6745

C. 0.7879

D. 0.6734

727. Any data collected by the investigator personally from the informants are called __________ data?
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A. Primary

B. None of these

C. Unofficial

D. Group data

728. P( ??x? + ?)=_________?
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A. 0.6743

B. .6826

C. 0.6745

D. 0.2345

729. Which of the following statement is true for CDF of the random variable X?
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A. From smallest upto specific value of x

B. None of these

C. From zero to specific value of x

D. From larger values of x

730. The term variance introduced by ___________?
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A. John Tukey

B. None of these

C. Karl Pearson

D. Ronald Fisher
731. The mode of the data 2,4,6,6,6,8 is _______________?
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A. 4

B. 30

C. 6

D. 8

732. Group data formula for mode _______?
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A. 1+ fm f2/f1 f2 x h

B. 1+ f1 f2/f2 fm x h

C. 1+ fm1 f2/f1 fm x h

D. 1 + fm f1/ (fm f1) + (fm1 f2) x h
733. The stub is the containing__________________?
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A. Row caption

B. Caption

C. Box head

D. Column captions

734. In regression the sign of (Bs) and (r)?
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A. None of these

B. Differ

C. Same

D. Change

735. When the assumption of normality not met we go for__________?
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A. Non parametric tests

B. Either both

C. None of these

D. Parametric test

736. For +ve and -ve skewed, check the sign of _______?
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A. 3

B. 2

C. ?1

D. ?2

737. A source note foot are the _______________?
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A. Bottom

B. Different

C. Same

D. Top

738. The shape of normal distribution does depend upon _____ and variance?
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A. x

B. S/?2

C. u

D. 2 2

739. A graph consists of _________ lines?
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A. Straight

B. Parallel Line

C. Curve

D. Smooth curve

740. If x = 3 then value of regression co-efficient of X or Y is ________________?
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A. -3

B. (0)

C. -4

D. -3