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April 16, 2014

Homework Help: statistics

Posted by sandra on Saturday, July 13, 2013 at 10:29pm.

A physician routinely makes physical examinations of children. She is concerned that a three-year-old girl has a height of only 87.8 cm. Heights of three-year-old girls have a mean of 97.5 cm and a standard deviation of 6.9 cm (based on data from the National Health and Nutrition Examination Survey).
a. Use the range rule of thumb to find the maximum and minimum usual heights of three-year-old girls.
b. Based on the result, is the height of 87.8 cm unusual?
c. Should the physician be concerned?

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