Elementary Statistics (12th Edition)

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

Chapter 8 - Hypothesis Testing - Review - Cumulative Review Exercises - Page 435: 1


a) $53.3$ b) $52.0$ c) $15.7$ d) $245.1$ e) $45$

Work Step by Step

a. The mean is: $\frac{51+63+36+43+34+62+73+39+53+79}{10}=53.3$ b) The median is the middle term, which in this case can either be $53$ or $51$. Hence we take the average of these to get that the median is $52.0$. c) Using a standard deviation calculator, we find that the standard deviation is $15.7$. d) To solve this problem, put the data in Microsoft Excel in cells A1 through A10. Then, in an empty cell, write: =VAR(A1:A10). Doing this, we find that the variance is $245.1$. e) The range is: $79−34=45$
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