swggerkid
Answered

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The lifespan of all microwave ovens sold in the United States has a mean of 9 years and a standard deviation of 2.5 years. If a particular microwave oven has z-score of -1.5, how many years did it last?
a.) 5.25 years
b.) 7.5

Sagot :

louayhe32

Answer:

7.5 years because United States has mor thne 9 years

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