Q48 A manufacturer knows that their items have a normally distributed lifespan, with a mean of 2.2 years, and standard d

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answerhappygod
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Q48 A manufacturer knows that their items have a normally distributed lifespan, with a mean of 2.2 years, and standard d

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Q48
A manufacturer knows that their items have a normally
distributed lifespan, with a mean of 2.2 years, and standard
deviation of 0.6 years.

If 7 items are picked at random, 9% of the time their mean life
will be less than how many years?

Give your answer to one decimal place.
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