SOLUTION: A baking company claims that the average shelf life for its bread is 7 days. Suppose that the standard deviation for the shelf life for this company's bread is 2 days and that the
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Question 407645: A baking company claims that the average shelf life for its bread is 7 days. Suppose that the standard deviation for the shelf life for this company's bread is 2 days and that the data representing the shelf lives are normally disributed. Approximately what percentage of the company's bread will have a shelf life between 11 and 13 days?
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
A baking company claims that the average shelf life for its bread is 7 days. Suppose that the standard deviation for the shelf life for this company's bread is 2 days and that the data representing the shelf lives are normally disributed. Approximately what percentage of the company's bread will have a shelf life between 11 and 13 days?
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z(11) = (11-7)/2 = 2
z(13) = (13-7)2 = 3
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P(11 < x < 13) = P(2 < z < 3) = 0.0214
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Cheers,
Stan H.
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