Commerce Exam > Commerce Tests > Test: Mean And Variance Of A Random Variable - Commerce MCQ

Test Description

Test: Mean And Variance Of A Random Variable for Commerce 2024 is part of Commerce preparation. The Test: Mean And Variance Of A Random Variable questions and answers have been prepared
according to the Commerce exam syllabus.The Test: Mean And Variance Of A Random Variable MCQs are made for Commerce 2024 Exam.
Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Mean And Variance Of A Random Variable below.

Solutions of Test: Mean And Variance Of A Random Variable questions in English are available as part of our course for Commerce & Test: Mean And Variance Of A Random Variable solutions in
Hindi for Commerce course.
Download more important topics, notes, lectures and mock test series for Commerce Exam by signing up for free. Attempt Test: Mean And Variance Of A Random Variable | 10 questions in 10 minutes | Mock test for Commerce preparation | Free important questions MCQ to study for Commerce Exam | Download free PDF with solutions

Test: Mean And Variance Of A Random Variable - Question 1

In a series of 2 n observations, half of them equal ‘a’ and remaining half equal – a. If the standard deviation of the observations is 2, then | a | equals ……

Detailed Solution for Test: Mean And Variance Of A Random Variable - Question 1

Test: Mean And Variance Of A Random Variable - Question 2

Let X be a random variable whose possible values x_{1}, x_{2}, x_{3}, …, x_{n} occur with probabilities p_{1}, p_{2}, p_{3},…, p_{n}, respectively. The mean of X, denoted by

1 Crore+ students have signed up on EduRev. Have you? Download the App |

Test: Mean And Variance Of A Random Variable - Question 3

The number of adults living in homes on a randomly selected city block is described by the following probability distribution.

What is the probability that 4 or more adults reside at a randomly selected home?

Detailed Solution for Test: Mean And Variance Of A Random Variable - Question 3

Test: Mean And Variance Of A Random Variable - Question 4

Two dice are thrown simultaneously. If X denotes the number of sixes, then the expectation of X is:

Detailed Solution for Test: Mean And Variance Of A Random Variable - Question 4

Test: Mean And Variance Of A Random Variable - Question 5

Let X be a random variable whose possible values x_{1}, x_{2}, x_{3}, …, x_{n} occur with probabilities p_{1}, p_{2}, p_{3},…, p_{n}, respectively. Also, μ be the mean of X. The variance of X, denoted by Var (X) is defined as

Test: Mean And Variance Of A Random Variable - Question 6

The variance of the number obtained on a throw of an unbiased dice is:

Detailed Solution for Test: Mean And Variance Of A Random Variable - Question 6

Test: Mean And Variance Of A Random Variable - Question 7

The mean number of tails in three tosses of a fair coin is:

Detailed Solution for Test: Mean And Variance Of A Random Variable - Question 7

Test: Mean And Variance Of A Random Variable - Question 8

A class has 10 students whose ages are 15, 14, 16, 17, 19, 20, 16, 18, 20, and 20 years. One student is selected in such a manner that each has the same chance of being chosen and the age X of the selected student is recorded. The standard deviation of X is:

Test: Mean And Variance Of A Random Variable - Question 9

Let X be a random variable whose possible values x_{1}, x_{2}, x_{3}, …, x_{n} occur with probabilities p_{1}, p_{2}, p_{3},…, p_{n}, respectively. Also, E(X) is the expectation of X, then E(X^{2}) - [E(X)]^{2} is known as

Test: Mean And Variance Of A Random Variable - Question 10

In a meeting, 60% of the members favour and 40% oppose a certain proposal. A member is selected at random and we take X = 0 if he opposed, and X = 1 if he is in favour. Find E(X) and Var(X).

Information about Test: Mean And Variance Of A Random Variable Page

In this test you can find the Exam questions for Test: Mean And Variance Of A Random Variable solved & explained in the simplest way possible.
Besides giving Questions and answers for Test: Mean And Variance Of A Random Variable, EduRev gives you an ample number of Online tests for practice

Download as PDF