Mean and Variance of Random  Variable-Module 2

Mean and Variance of Random Variable-Module 2

12th Grade

8 Qs

quiz-placeholder

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Mean and Variance of Random  Variable-Module 2

Mean and Variance of Random Variable-Module 2

Assessment

Quiz

Mathematics

12th Grade

Hard

Created by

GUADALIZA VILLAMOR

Used 15+ times

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8 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following notations is equivalent to the mean of the probability?

none of the above

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which formula is appropriate to use in finding the mean of a discrete random

variable?

E(x) = μx = ∑ x ∙ P(x)

E(x) = μx = ∑ x + P(x)

E(x) = μx = ∑ x ∙ P(x)^2

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What can we generate if we take the squares of standard deviation?

Expected Value

Mean Value

Probability value

Variance

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following is TRUE about the value of the mean of a discrete random

variable?

Mean value is always equal to 1.

Mean value cannot be negative.

Mean value is equal to the expected value.

Mean, Variance, and Standard Deviation are equal.

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following most likely shows the largest possible variance or variability?

number of girls in a randomly selected three-child family

number of newborn babies per minute

number of cookies inside a 133 grams pack from different branch of 7-11

stores

number of patients who are positive with COVID-19 in different hospitals

6.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

To which of the following concepts refer to this statement, “the sum of the product

of each value of a discrete random variable and its corresponding probability”?

Probability Distribution

Variance of Discrete Probability Distribution

Standard Deviation of Discrete Probability Distribution

Mean or Expected Value of Discrete Probability Distribution

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following is also equal to the square root of the variance?

mean

median

probability

standard deviation

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