Calculations with the test scores data of Exercise 2.22 give = 150.125 and s = 24.677.
Question:
(a) Find the proportion of the observations in the intervals ± 2 s and ± 3 s.
(b) Compare your findings in part (a) with those suggested by the empirical guidelines for bell-shaped distributions.
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Related Book For
Statistics Principles And Methods
ISBN: 9780470904114
7th Edition
Authors: Richard A. Johnson, Gouri K. Bhattacharyya
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