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The mean per capita consumption of milk per year is 153 liters with a standard deviation...

The mean per capita consumption of milk per year is 153 liters with a standard deviation of 2727 liters.

If a sample of 90 people is randomly selected, what is the probability that the sample mean would be less than 146.97  liters? Round your answer to four decimal places.

Math   Statistics-And-Probability   
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Answer #1

µ = 153

sd = 27

n = 90

                                 

                                  = P(Z < -2.12)

                                  = 0.0170

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