To assist in estimating the amount of lumber in a tract of timber, an owner decided to
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a. Construct a relative frequency histogram to describe these data.
b. Calculate the sample mean y as an estimate of m, the mean number of timber trees with diameter exceeding 12 inches for all 50 3 50 squares in the tract.
c. Calculate s for the data. Construct the intervals (y-bar ± s), (y-bar ± 2s), and (y-bar ± 3s). Count the percentages of squares falling in each of the three intervals, and compare these percentages with the corresponding percentages given by the Empirical Rule.
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Related Book For
An Introduction To Statistical Methods And Data Analysis
ISBN: 9781305465527
7th Edition
Authors: R. Lyman Ott, Micheal T. Longnecker
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