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October 20, 2014

Homework Help: gre math prob of a sample

Posted by luckybee on Tuesday, January 10, 2012 at 10:50pm.

sample standard deviation = 3
sample mean = 68
n=30
what is the probability that one student selected at random from the sample will have a height within one sample standard deviation of the sample mean?

a. 1.00
b. 0.73
c. 0.57
d. 0.23

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