ACET (Actuarial Common Entrance Test) Statistics: Questions 187 - 191 of 201

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Question 187

Question

MCQ▾

Find the standard deviation & coefficient of variation when the followings are given-

Variance

Choices

Choice (4)Response

a.

2,10 %

b.

16,2.5 %

c.

2,5 %

d.

16,5 %

Question 188

Question

MCQ▾

In a telephone enquiry system, the number of phone calls regarding relevant enquiry follow poisson distribution with an average of five phone calls during 10-minute time intervals. The probability that there is at the most one phone call during a 10- minute time period is

Choices

Choice (4)Response

a.

b.

c.

d.

Question 189

Question

MCQ▾

Let X and Y be two events such that which of the following is incorrect?

Choices

Choice (4)Response

a.

b.

X and Y are independent

c.

d.

Question does not provide sufficient data or is vague

Question 190

Question

MCQ▾

Three coins are tossed simultaneously. Consider the event E ‘three heads or three tails’ , F ‘at least two heads’ and G ‘at most two heads’ . Of the pairs and which are independent?

Choices

Choice (4)Response

a.

b.

c.

d.

Question does not provide sufficient data or is vague

Question 191

Question

MCQ▾

If the probability of a defective bolt is . Find the mean and standard deviation for the distribution in a total of 400.

Choices

Choice (4)Response

a.

40,6

b.

50,40

c.

100,40

d.

40,36

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