SOLUTION: A manufacturer knows that their items have a normally distributed lifespan with a mean of 2.9 years and a standard deviation of 0.6 years.
If you randomly purchase one item, wha
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Question 1153627: A manufacturer knows that their items have a normally distributed lifespan with a mean of 2.9 years and a standard deviation of 0.6 years.
If you randomly purchase one item, what is the probability it will last longer than 4 years? Round answer to 3 decimal places.
Answer by Boreal(15235) (Show Source): You can put this solution on YOUR website!
z=(x-mean)/sd
>(4-2.9)/0.6 or > 1.1/0.6
this has probability of 0.0334 or 0.033
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