Answer
$s=0.225~grams$
Work Step by Step
$s=\sqrt {\frac{Σ(x_i-x̅)^2}{n-1}}=\sqrt {\frac{(90.8-91.03)^2+(90.8-91.03)^2+(90.9-91.03)^2+(91.2-91.03)^2+(91.2-91.03)^2+(91.3-91.03)^2}{6-1}}=0.225$
Statistics: Informed Decisions Using Data (4th Edition)
by Sullivan III, Michael
Published by
Pearson
ISBN 10:
0321757270
ISBN 13:
978-0-32175-727-2
Chapter 3 - Section 3.2 - Consumer Reports - Basement Waterproofing Coatings - Page 157: b
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