A manufacturer knows that their items have a normally distributed length, with a mean of 12.9 inches, and standard devia

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A manufacturer knows that their items have a normally distributed length, with a mean of 12.9 inches, and standard devia

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A Manufacturer Knows That Their Items Have A Normally Distributed Length With A Mean Of 12 9 Inches And Standard Devia 1
A Manufacturer Knows That Their Items Have A Normally Distributed Length With A Mean Of 12 9 Inches And Standard Devia 1 (36.99 KiB) Viewed 9 times
A manufacturer knows that their items have a normally distributed length, with a mean of 12.9 inches, and standard deviation of 2.5 inches. If 25 items are chosen at random, what is the probability that their mean length is less than 12.7 inches? P(a < 12.7) = Submit Question Question 5 0/2 pts 32 Details A manufacturer knows that their items have a normally distributed lifespan, with a mean of 9.2 years, and standard deviation of 1.4 years. Submit Question If you randomly purchase 25 items, what is the probability that their mean life will be longer than 9 years? P(Z > 9) =
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