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In: Statistics and Probability

A manufacturer knows that their items have a normally distributed lifespan, with a mean of 2.2...

A manufacturer knows that their items have a normally distributed lifespan, with a mean of 2.2 years, and standard deviation of 0.7 years.

If you randomly purchase 3 items, what is the probability that their mean life will be longer than 1 years? (Give answer to 4 decimal places.)

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Expert Solution

table for P(z<Z)

(please upvote)

orchestra answered 1 year ago
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