Statistics: Informed Decisions Using Data (4th Edition)

Published by Pearson
ISBN 10: 0321757270
ISBN 13: 978-0-32175-727-2

Chapter 3 - Section 3.2 - Assess Your Understanding - Applying the Concepts - Page 153: 23e

Answer

16% of M&Ms weigh more than 0.911 grams.

Work Step by Step

Using the Empirical rule, we have: x̅ - 1s = 0.875 - 0.036 = 0.875 - 0.036 = 0.839 x̅ - 2s = 0.875 + 0.036 = 0.875 + 0.036 = 0.911 Hence, 68% of M&Ms weigh between 0.803 and 0.947 grams according to the Empirical Rule. Therefore, 100 - 68 = 32% of M&Ms weigh less than or more than 0.911 grams. Hence 32./2 = 16% of M&Ms weigh more than 0.911 grams.
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