Business Statistics And Research Methods - Study Mode

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[#286] Two cards are drawn from a well-shuffled pack of 52 cards. Find the probability that they are both aces if the first is replaced.

(A) $$frac{1}{{169}}$$

(B) $$frac{2}{{52}}$$

(C) $$frac{1}{{221}}$$

(D) None of these

Correct Answer

(A) $$frac{1}{{169}}$$

[#287] The Standard deviation of Poisson distribution is: (m = mean)

(A) m

(B) √m

(C) m 2

(D) 1/√m

Correct Answer

(B) √m

[#288] Consider the given statement, "the conclusions obtained statistically are universally true". This statement is

(A) true

(B) false

(C) partly true

(D) partly false

Correct Answer

(B) false

[#289] While constructing the cost-of-living index for a particular class, the commodities they consume have varying importance. Which of the following measures of central tendency should be counted as the best option?

(A) Harmonic Mean

(B) Weighted Arithmetic Mean

(C) Weighted Geometric Mean

(D) Median

Correct Answer

(B) Weighted Arithmetic Mean

[#290] There are two equal numbers 5 and 5 in a series. What will be the geometric mean of the series?

(A) 5

(B) 10

(C) 3.33

(D) 2.5

Correct Answer

(A) 5