The set of life spans of an appliance is normally distributed with a mean mc012-1.jpg = 48 months and a standard deviation mc012-2.jpg = 8 months. what is the z-score of an appliance that stopped working at 64 months?

The z-score of an appliance that stopped working at 64 months is 2

Step-by-step explanation:

We know that,

where,

Z = Z score,

X = raw score = 64

μ = mean = 48

σ = standard deviation = 8

Putting the values,

Therefore, the z-score of an appliance that stopped working at 64 months is 2.

555.99.

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