ISS (Statistical Services) Statistics Paper I (New 2016 MCQ Pattern): Questions 210 - 213 of 461

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Question number: 210

» Probability » Law of Total Probability

MCQ▾

Question

Patients are recruited onto the two arms (Control, Treatment) of a clinical trial. The probability that an adverse outcome occurs on the control arm is , and is for the treatment arm. Patients are allocated alternately onto the two arms, and their outcomes are independent. What is the probability that the first adverse event occurs on the control arm?

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 211

» Probability » Conditional Probability

MCQ▾

Question

In describing the survival rate and life expectancy in a certain population, let denote the event of reaching the age of years and be the corresponding probability. If then, what is the probability that a 50 years old will die within 5 years?

Choices

Choice (4) Response

a.

0.253

b.

c.

0.965

d.

Question does not provide sufficient data or is vague

Question number: 212

» Probability » Distribution Functions and Properties

MCQ▾

Question

Let X be a continuous random variable with the following PDF

where, is a positive constant. The value of is?

Choices

Choice (4) Response

a.

1

b.

c.

2

d.

None of the above

Question number: 213

» Probability » Discrete and Continuous Random Variables

MCQ▾

Question

Z is the distance traveled by a randomly chosen business consultant last year. Is the random variable Z discrete or continuous?

Choices

Choice (4) Response

a.

Can’t say anything

b.

Sometime discrete sometime continuous

c.

Discrete

d.

Continuous

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