ISS (Statistical Services) Statistics Paper I (New 2016 MCQ Pattern): Questions 204 - 209 of 461

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Question number: 204

» Probability » Discrete and Continuous Random Variables

MCQ▾

Question

Which of the following cannot be the example of exponential random variable?

Choices

Choice (4) Response

a.

Number of pizza a person eats in a month.

b.

The time until the next jobs arrives at a database server.

c.

The distance we travel along a road until we find the next pothole.

d.

All of the above

Question number: 205

» Probability » Discrete and Continuous Random Variables

MCQ▾

Question

A randomly chosen child repeatedly hits a bell. X is the length of time it takes to break it open. Is the random variable X discrete or continuous?

Choices

Choice (4) Response

a.

Continuous

b.

Can’t say anything.

c.

Discrete

d.

Sometime discrete sometime continuous

Question number: 206

» Probability » Probability Distributions » Uniform

MCQ▾

Question

If , then what will be the standard deviation of ?

Choices

Choice (4) Response

a.

261.2

b.

59.8

c.

120.5

d.

161.4

Question number: 207

» Probability » Probability Distributions » Bernoulli

MCQ▾

Question

Which of the following is skewness of a standardized Bernoulli distributed random variable which takes the value 1 with success probability of and the value 0 with failure probability of ?

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 208

» Probability » Probability Distributions » Exponential

MCQ▾

Question

The moment generating function of an exponential random variable X with parameter λ (for t < 1/ λ) is:

Choices

Choice (4) Response

a.

b.

c.

d.

All of the above

Question number: 209

» Probability » Probability Distributions » Normal

MCQ▾

Question

Suppose marks of students in a test are normally distributed. If the test has a mean of 100 and a standard deviation of 10, what is the probability that a student who gives the test will score between 90 and 110?

Choices

Choice (4) Response

a.

0.84

b.

0.68

c.

0.16

d.

All of the above

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