Suppose that replacement times for washing machines are normally distributed with a mean of 9.3 years and a standard deviation

Question

Suppose that replacement times for washing machines are normally distributed with
a mean of 9.3 years and a standard deviation of 1.1 years. Find the probability that 70
randomly selected washing machines will have a mean replacement time less than
9.1 years.
0.4357
0.4286
0.0643
0.0714

Kunduz · Accepted Answer

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