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A normally distributed population has a mean of 400 and a standard deviation of 30. a. Determine the probability that a random sample of size
A normally distributed population has a mean of
400
and a standard deviation of
30.
a. Determine the probability that a random sample of size
9
selected from this population will have a sample mean less than
380.
b. Determine the probability that a random sample of size
25
selected from the population will have a sample mean greater than or equal to
414.
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