About % of the area is between z = -1 and z = 1 (or within 1

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About % of the area is between z = -1 and z = 1 (or within 1 standard deviation of the mean). Find the indicated area under the curve of the standard normal distribution, then convert it to a percentage and fill in the blank. The results form the basis for the range rule of thumb and the empirical rule introduced in Section 3-3.
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Elementary Statistics

ISBN: 9780321836960

12th Edition

Authors: Mario F. Triola

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