Intro Stats (5th Edition)
5th Edition
ISBN: 9780134210223
Author: Richard D. De Veaux, Paul F. Velleman, David E. Bock
Publisher: PEARSON
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Textbook Question
Chapter 5, Problem 39E
Trees A forester measured 27 of the trees in a large woods that is up for sale. He found a mean diameter of 10.4 inches and a standard deviation of 4.7 inches. Suppose that these trees provide an accurate description of the whole forest and that a Normal model applies.
- a) Draw the Normal model for tree diameters.
- b) What size would you expect the central 95% of all trees to be?
- c) About what percent of the trees should be less than an inch in diameter?
- d) About what percent of the trees should be between 5.8 and 10.4 inches in diameter?
- e) About what percent of the trees should be over 15 inches in diameter?
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Intro Stats (5th Edition)
Ch. 5.1 - Your statistics teacher has announced that the...Ch. 5.1 - A distribution of incomes shows a strongly right...Ch. 5.2 - Prob. 3JCCh. 5.2 - Prob. 4JCCh. 5.3 - As a group, the Dutch are among the tallest people...Ch. 5.3 - Prob. 6JCCh. 5.3 - The mean of our original sample of 100 commute...Ch. 5.3 - Prob. 8JCCh. 5 - Stats test The mean score on the Stats exam was 75...Ch. 5 - Mensa People with z-scores above 2.5 on an IQ test...
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