Answer
a. n = 2+3+5+1+1 = 12
b. $ΣX$ = (5*2)+(4*3)+(3*5)+(2*1)+(1*1) = 40
c. $ΣX^{2}$ = $(5^2*2)+(4^2*3)+(3^2*5)+(2^2*1)+(1^2*1)$ = 148
Work Step by Step
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Essentials of Statistics for the Behavioral Sciences 8th Edition
by Gravetter, Frederick J.; Wallnau, Larry B.
Published by
Cengage Learning
ISBN 10:
1133956572
ISBN 13:
978-1-13395-657-0
Chapter 2 - Frequency Distributions - Problems - Page 56: 3
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