The life expectancy of Timely brand watches follows a normal distribution with a mean of four...
The life expectancy of Timely brand watches follows a normal distribution with a mean of four years and a standard deviation of eight months.(Please show all work)
A. Ninety-five percent of the watches will have a life expectancy of greater than how many months?
B. What are the minimum and the maximum life expectancy of the middle 95% of the watches?
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