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Posted by on Monday, October 31, 2011 at 5:34pm.

The distribution of heights of adult males has a mean of 69 inches and a standard deviation of 4 inches. A random sample of 36 adult males is selected. Find the probability that the average height will be more than 70 inches.
a.0.668
b.0.858
c.0.908
d.0.995

  • Statistics - , Monday, October 31, 2011 at 6:16pm

    Z = (Sample mean-Pop. mean)/SEm

    SEm = SD/√n

    Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion related to the Z score.

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