How to practice concept:random-variables

Attempt a question, record the concept and assumptions, then check the available answer. Rework mistakes after revising the relevant concepts. Topic tags can overlap; review the question context.

Questions 1–4 of 4. Imported answers require independent review unless marked reviewed.

Topic practice 4 questionsPage 1 of 1

Question 31

Open question
PINAT1 markNeeds review
If

is a continuous random variable with the probability density function

, then the value of

is ________ . (Answer in integer)

Log in to check the answer

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

Question 37

Open question
PINAT2 marksNeeds review
The probability mass function

of a discrete random variable X is given by

, where x = 1, 2, ···, ∞. The expected value of X is _________. [in integer]

Log in to check the answer

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

Question 5

Open question
PIMCQ1 markNeeds review
If

is a random variable with the expected value of 5 and the variance of 1, then the expected value of

is
Your answerChoose one option.

Log in to check the answer

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

Question 36

Open question
PINAT2 marksNeeds review
If the probability density function of a random variable

is given by

the value of

is __________.

Log in to check the answer

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer