ISS (Statistical Services) Statistics Paper I (New 2016 MCQ Pattern): Questions 357 - 361 of 472

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Question 357

Question

MCQ▾

Suppose someone wants to estimate Prime minister՚s approval rating by asking persons drawn at random from the voter population. Let

Now if he/she want to be confident that he/she is within of the actual approval rating then from how many (minimum number of) people he should ask?

Choices

Choice (4)Response

a.

25,000

b.

10,000

c.

1000

d.

50,000

Question 358

Question

MCQ▾

Let random variables , be independent Poisson random variables. So if then, which of the following is the characteristic function of if ?

Choices

Choice (4)Response

a.

b.

c.

d.

All of the above

Question 359

Question

MCQ▾

Let and be independent; each is uniformly distributed on Let , then ________.

Choices

Choice (4)Response

a.

b.

1

c.

d.

Question 360

Question

MCQ▾

If and are independent discrete random variables with the non-negative integers as range, and with distribution function then, what is the distribution of ?

Choices

Choice (4)Response

a.

Poission distribution

b.

Geometric distribution

c.

Negative binomial distribution

d.

Question does not provide sufficient data or is vague

Question 361

Question

MCQ▾

Let be independent count r. v. s. If the are identically distributed, each with Probability generating function then has Probability generating function________.

Choices

Choice (4)Response

a.

b.

c.

d.

Question does not provide sufficient data or is vague