The set of life spans of an appliance is normally distributed with a mean mu is equal to 48 months and a standard deviation sigma is equal to 8 months. What is the z - score of an appliance that stopped working at 64 months?

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Introduction to Normal Distributions - Quiz Quiz

The set of life spans of an appliance is normally distributed with a mean mu is equal to 48 months and a standard deviation sigma is equal to 8 months. What is the z - score of an appliance that stopped working at 64 months?

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