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Normal Distribution: Out of 500 connectors sold, how many do the company expect to replace on average?

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Electrical connectors manufactured by a supply company last an average of 18.2 months and follow a normal distribution with a standard deviation of 1.7 months. The company agrees to replace any connector that fails within 19 months. Out of 500 connectors sold, how many do the company expect to replace on average?

Answer to nearest whole number.

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Solution Summary

This solution calculates probability using normal distribution and simple calculations.

Solution Preview

We will find the probability of failing within 19 months

Mean=M = 18.2 months
Standard deviation =s= ...

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