Posted by **Anonymous** on Wednesday, October 24, 2012 at 10:19am.

A university wants to estimate the average distance that commuter students travel to get to class with an error of ±3 miles and 90 percent confidence. What sample size would be needed, assuming that distances are normally distributed with a range of X = 0 to X = 50 miles, and using the Empirical Rule ±3 to estimate ?

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**Bartholemewl**, Monday, December 3, 2012 at 7:51pm
21

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**Bob**, Sunday, April 6, 2014 at 11:02pm
47

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**Bob**, Sunday, April 6, 2014 at 11:06pm
28

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**Clifford the Big Red Dog**, Sunday, April 6, 2014 at 11:07pm
21

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**Spongebob Squarepants**, Sunday, April 6, 2014 at 11:08pm
30

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