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: 24c

Answer

95% of of eruptions last between 92 and 116 seconds.

Work Step by Step

Using the Empirical rule, we have: x̅ - 2s = 104 - 2 (6.249) $\approx$ 92 x̅ + 2s = 104 + 2 (6.249) = $\approx$ 116 Hence, 95% of of eruptions last between 92 and 116 seconds. according to the Empirical Rule.
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