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January 25, 2015

January 25, 2015

Posted by **Martin** on Thursday, October 14, 2010 at 2:31pm.

A. What is the probability that the buildings height is over 280 feet?

B. What is the probability that a sample of 80 buildings is gathered and the mean height of the buildings was over 280 feet?

- Probability help -
**bobpursley**, Thursday, October 14, 2010 at 3:09pma. http://davidmlane.com/hyperstat/z_table.html

b. sample standard deviation= sqrt(30^2/80)= 3.35 recompute, given mean 275, sigma 3.35

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