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A manufacturer knows that their items have a normally distributed lifespan, with a mean of 7.8...

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Statistics

A manufacturer knows that their items have a normallydistributed lifespan, with a mean of 7.8 years, and standarddeviation of 0.7 years.

If you randomly purchase one item, what is the probability it willlast longer than 6 years? (Give answer to 4 decimal places.)

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A manufacturer knows that their items have a normallydistributed lifespan with a mean of 78 years and standarddeviation of 07 yearsIf    See Answer
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