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help with statistics homework

Statistics
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A normal population has a mean of 78 and a standard deviation of 6.You select a sample of 50

Compute the probability the sample mean is: (Round z value to 2 decimal places and final answer to 4 decimal places)

a) Less than 77

probability

b) Between 77 aand 79

probability

c) Between 79 and 80

probability

d) Greater than 80

probability

Apr 10th, 2015

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Apr 10th, 2015

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Apr 10th, 2015
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