Mathematics

Amiya Russo

24 May, 12:38

The average American adult has completed an average of 11.25 years of education with a standard deviation of 1.75 years. A random sample of 75 adults is taken. a) What is the probability that the sample will have a mean more than 11.5? b) What is the probability that the sample will have a mean between 11 and 12 years?

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