ISS Statistics Paper I (New 2016 MCQ Pattern): Questions 257 - 260 of 404

Get 1 year subscription: Access detailed explanations (illustrated with images and videos) to 404 questions. Access all new questions we will add tracking exam-pattern and syllabus changes. View Sample Explanation or View Features.

Rs. 300.00 or

Question number: 257

» Probability » Probability Distributions » Laplace

MCQ▾

Question

The characteristic function of standard Laplace distribution is ________

Choices

Choice (4) Response
a.

11t2

b.

11+t2

c.

11t2

d.

11+t2

Question number: 258

» Probability » Probability Distributions » Negative Binomial

MCQ▾

Question

Suppose that X and Y are independent random variables for an experiment, and that X~ Negative Binomial distribution (j,p) and Y~ Negative Binomial distribution (k,p) . Then

Choices

Choice (4) Response
a.

Binomial distribution (k+j2,p)

b.

Negative Binomial distribution (k+j2,p)

c.

Negative Binomial distribution (k+j2,1p)

d. None of the above

Question number: 259

» Probability » Probability Distributions » Cauchy

MCQ▾

Question

Which of the following statement is correct regarding the pdf of standard Cauchy distribution?

Choices

Choice (4) Response
a.

It increases and then decreases, with mean x=0 .

b.

It is concave upward, then downward, and then upward again, with inflection points at x=±12 .

c.

It is symmetric about its mean.

d. None of the above

Question number: 260

» Probability » Probability Distributions » Normal

MCQ▾

Question

If X1,X2,X3,X4,X5 are i. i. d with standard normal distributions, the value of c so that the random variable c(X1+X2)X32+X42+X52 has a t-distribution is________.

Choices

Choice (4) Response
a.

c=23

b.

c=32

c.

c=12

d. All of the above

Sign In