# Probability (ISS Statistics Paper I (New 2016 MCQ Pattern)): Questions 120 - 122 of 205

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## Question number: 120

» Probability » Probability Distributions » Conditional Distributions

MCQ▾

### Question

A continuous random vector have joint probability distribution function

What is the mean of conditional density of given ?

### Choices

Choice (4) Response

a.

b.

c.

x

d.

None of the above

## Question number: 121

» Probability » Probability Distributions » Gamma

MCQ▾

### Question

Suppose that a bullet is fired at a target at the origin of a plane coordinate system, with units in meters. The bullet lands at where and are independent and each has the normal distribution with mean 0 and variance 100. The bullet will destroy the target if it lands within 20 meters of the target. Find the probability of this event.

### Choices

Choice (4) Response

a.

0.8647

b.

c.

d.

None of the above

## Question number: 122

» Probability » Probability Distributions » Lognormal

MCQ▾

### Question

Using the method of moment estimation, find the estimators and of parameters of if .

### Choices

Choice (4) Response

a.

and

b.

and

c.

and

d.

All of the above

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