Elementary Statistics (12th Edition)

Published by Pearson
ISBN 10: 0321836960
ISBN 13: 978-0-32183-696-0

Chapter 5 - Discrete Probability Distributions - 5-2 Probability Distributions - Basic Skills and Concepts - Page 207: 7


It is a probability distribution, mean:2, standard deviation:1.

Work Step by Step

It is a probability distribution because $\sum P(x)=0.0625+0.25+0.375+0.25+0.0625=1$. Mean $0\cdot0.0625+1\cdot0.25+2\cdot0.375+3\cdot0.25+4\cdot0.0625=2$. Standard deviation: $\sqrt{(0-2)^2\cdot0.0625+(1-2)^2 \cdot0.25+(2-2)^2\cdot0.375+(3-2)^2\cdot0.25+(4-2)^2\cdot0.0625}=1$.
Update this answer!

You can help us out by revising, improving and updating this answer.

Update this answer

After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.