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Elementary Statistics | 12th Edition | ISBN: 9780321836960 | Authors: Mario F. Triola
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Sample Size. In Exercises, find the sample

Chapter 7, Problem 29BSC

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Problem 29BSC

Sample Size. In Exercises, find the sample size required to estimate the population mean.

Sample Size Using Range Rule of Thumb You want to estimate the mean SAT score of all college applicants. First use the range rule of thumb to make a rough estimate of the standard deviation of those scores. Possible SAT scores range from 600 to 2400. Use the es­timated standard deviation to determine the sample size corresponding to a 98% confidence level and a margin of error of 100 points. What isn’t quite right with this exercise?

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QUESTION:

Problem 29BSC

Sample Size. In Exercises, find the sample size required to estimate the population mean.

Sample Size Using Range Rule of Thumb You want to estimate the mean SAT score of all college applicants. First use the range rule of thumb to make a rough estimate of the standard deviation of those scores. Possible SAT scores range from 600 to 2400. Use the es­timated standard deviation to determine the sample size corresponding to a 98% confidence level and a margin of error of 100 points. What isn’t quite right with this exercise?

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