Question
Sales in a caf are normally distributed with a mean of $12 and a standard deviation of $4. A random sample of 25 sales is
Sales in a caf are normally distributed with a mean of $12 and a standard deviation of $4.
A random sample of 25 sales is drawn from the population. What is the probability that the mean of this sample is less than $14?
a, P(Z < 2.5) = 0.5987
b, P(Z < 2.5) = 0.9938
c, P(Z < 2.5) = 0.0062
d, P(Z < 2.5) = 0.4013
e, (Z < 2.5) = 1.0000
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Matrix Theory And Applications With MATLAB
Authors: Darald J Hartfiel
1st Edition
1482285630, 9781482285635
