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Hiii. I want to know the process of this, not just answer. I really need to understand how to solve similar problems. Thanks :) Question

Hiii. I want to know the process of this, not just answer. I really need to understand how to solve similar problems. Thanks :)

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Question 1 The life expectancy in California is 81 years with a standard deviation of 8 years. A random sample of 64 individuals is selected. What is the probability that the sample mean will be between 79 and 81 years

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