Introductory Statistics 9th Edition

Published by Wiley
ISBN 10: 1-11905-571-7
ISBN 13: 978-1-11905-571-6

Chapter 3 - Self-Review Test - Page 122: 6



Work Step by Step

s^2=$(∑m^2 f-( ((∑〖mf)〗^2 )/n))/(n-1)$ The formula above is the basic formula to calculate the population and sample variances for grouped data, and $s^2$ is the sample variance. Thus we can see that sample variance is the mean of the squared deviations of x values from the mean.
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