A manufacturer knows that their items have a normally distributed lifespan, with a mean of 12.9 years, and standard devi

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A manufacturer knows that their items have a normally distributed lifespan, with a mean of 12.9 years, and standard devi

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A Manufacturer Knows That Their Items Have A Normally Distributed Lifespan With A Mean Of 12 9 Years And Standard Devi 1
A Manufacturer Knows That Their Items Have A Normally Distributed Lifespan With A Mean Of 12 9 Years And Standard Devi 1 (21.06 KiB) Viewed 54 times
A manufacturer knows that their items have a normally distributed lifespan, with a mean of 12.9 years, and standard deviation of 0.9 years. The 9% of items with the shortest lifespan will last less than how many years? Answer = (Give your answer rounded to two decimal places.) Warning: Do not use the Z Normal Tables...they may not be accurate enough since WAMAP may look for more accuracy than comes from the table.
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