Business Statistics And Research Methods - Study Mode

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[#941] A coin is biased so that its chances of landing Head is 21.3. If the coin is flipped 3 times, the probability that the first 2 flips are heads and the 3 rd flip is a tail is:

(A) 4/27

(B) 8/27

(C) 4/9

(D) 2/9

Correct Answer

(A) 4/27

[#942] When large weights have to be given to small items and small weights to large items the most appropriate mean for its measurement is?

(A) Arithmetic mean

(B) Median

(C) Mode

(D) Geometric mean

Correct Answer

(D) Geometric mean

[#943] The frequencies in the cumulative frequency distribution are placed

(A) Cumulatively

(B) Systematically

(C) In ascending order

(D) In descending order

Correct Answer

(A) Cumulatively

[#944] The sum total of the values of two variables 'X' and 'Y' is equal for all the observations. The value of the coefficient of correlation between 'X' and 'Y' is:

(A) +1 (perfectly positive)

(B) -1 (perfectly negative)

(C) Zero (No correlation)

(D) > 0 < 1 (Imperfect correlation)

Correct Answer

(B) -1 (perfectly negative)

[#945] In small samples, we use relatively . . . . . . . . confidence intervals as the results of small samples usually vary widely from sample to sample.

(A) wide

(B) small

(C) constant

(D) None of these

Correct Answer

(A) wide