Q27 A manufacturer knows that their items have a normally distributed lifespan, with a mean of 10.5 years, and standard

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answerhappygod
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Q27 A manufacturer knows that their items have a normally distributed lifespan, with a mean of 10.5 years, and standard

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Q27
A manufacturer knows that their items have a normally
distributed lifespan, with a mean of 10.5 years, and standard
deviation of 2.3 years.

If you randomly purchase 16 items, what is the probability that
their mean life will be longer than 10 years?
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