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# \$4.00statistics homework help

• From Mathematics: Statistics
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• Due on Apr. 06, 2012
• Asked on Apr 03, 2012 at 6:56:29PM

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Suppose that the average number of years to graduate at a university is 4 years, with a standard deviation of 0.5 years. Assume a bell-shaped distribution for years to graduate.

1. From the Empirical Rule, what is a range of values that 95% of the students should graduate between?
2. From the Empirical Rule, what is a range of values that 68% of the students should graduate between?
3. From the Empirical Rule, what is a range of values that 99.7% of the students should graduate between?
4. Suppose that the average height for college men is 66 inches. If the height distribution is bell-shaped, and 95% of the men have heights between 60 inches and 72 inches, what is the standard deviation of heights for this population?