Statistics Questions and Answers

11-Formula for calculating mean for hypergeometric probability distribution is
(A) n (M ⁄ N)
(B) n (n ⁄ m)
(C) m (n ⁄ N)
(D) N (M ⁄ n)
12-The process of making estimates about the population parameter from a sample is called:
(A) Statistical decision
(B) Statistical hypothesis
(C) Statistical inference
(D) Statistical independence
13-Operation research analysts do not
(A) Recommend decision
(B) Collect the relevant data
(C) Build more than one model
(D) Predict future operation
14-The distribution for which moment generating function (m.g.f.) does not exist is:
(A) Rectangular distribution
(B) Exponential distribution
(C) Gamma distribution
(D) Cauchy distribution
15-How is Spearman’s Rho(ρ) calculated?
(A) Spearman’s Rho uses the original scores, no transformations are needed
(B) Spearman’s Rho is calculated by transforming original data into categories
(C) Spearman’s Rho is calculated by transforming original scores into deviations
(D) Spearman’s Rho is calculated by transforming original scores into ranks

16-The condition when there is no solution which satisfies all the constraints in the linear programming problem is called
(A) Optimality
(B) Infeasibility
(C) Feasibility
(D) Unboundedness
17-2nd Quartile = 5th Decile = 50th Percentile = ?
(A) Geometric Mean
(B) Mean
(C) Median
(D) Mode
18-In ANOVA, if the true means of the k population are equal, then MSTR/MSE should be:
(A) a negative value between 0 and – 1
(B) close to 0.00
(C) close to 1.00
(D) not enough information to make a decision
19-From the following methods, ___ is a method to obtain initial solution to transportation problem.
(A) Newton Raphson
(B) Simplex
(C) Hungarian
(D) North-West
20-Which of the following is a qualitative random variable?
(A) highest educational qualification of respondents in an interview
(B) nicotine content of a cigarette
(C) distance in metres that you have walked already today
(D) height of the cable car station on the top of Table Mountain in Cape Town
ANSWERS:
11-(A), 12-(C), 13-(D), 14-(D), 15-(D), 16-(B), 17-(C), 18-(C), 19-(D), 20-(A)