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Question

$4.00 statistics homework help

  • From Mathematics: Statistics
  • Closed, but you can still post tutorials
  • Due on Apr. 06, 2012
  • Asked on Apr 03, 2012 at 6:56:29PM
Asked by :
Selena0215
 
 
Q:

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?