Business Statistics - Study Mode

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[#96] MIS can be used in controlling

(A) Operations research models

(B) Risk analysis models

(C) PERT/CPM

(D) All of these

Correct Answer

(D) All of these

[#97] Which of the following statements are correct? 1. Correlation analysis helps in determining the relationship between two or more variables. It does not tell us anything about the cause and effect relationship. 2. The ratio of explained variation to the total variation is called the coefficient of correlation. 3. Pearsonian coefficient always assumes linear relationship, and is unduly effected by the extreme items.

(A) 1 and 2

(B) 1 and 3

(C) 2 and 3

(D) 1, 2 and 3

Correct Answer

(B) 1 and 3

[#98] Given N = 8, $$overline X $$ = 74.5, A x = 69.0, σ x = 13.07, $$overline Y $$ = 125.5, A y = 112, σ y = 15.85, $$sum $$dxdy = 2176. Find out correlation

(A) +0.22

(B) +0.92

(C) +0.96

(D) +0.36

Correct Answer

(C) +0.96

[#99] Eight coins are tossed together and the occurrence of a head is termed a success. Write down the Binomial distribution of probabilities for the occurrence of 0, 1, 2 . . . . 8 heads. What is the arithmetic mean and what is the variance of this distribution?

(A) 2

(B) 9

(C) 3

(D) 5

Correct Answer

(A) 2

[#100] $$F = frac{{{S^2}_1}}{{{S^2}_2}}$$ xa0 is a

(A) z-test

(B) F-test

(C) Z-test

(D) mean test

Correct Answer

(B) F-test