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A manufacturer knows that their items have a normally distributed lifespan, with a mean of 14.3...

A manufacturer knows that their items have a normally distributed lifespan, with a mean of 14.3 years, and standard deviation of 0.9 years. The 9% of items with the shortest lifespan will last less than how many years? Give your answer to one decimal place. Can you please explain written out each step

Math   Statistics-And-Probability   
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Answer #1

Given that, mean = 14.3 years and

standard deviation = 0.9 years

We want to find, the value of x such that, P(X < x) = 0.09

Therefore, The 9% of items with the shortest lifespan will last less than 13.1 years

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