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Grading Egg Sizes - Normal Distribution

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In grading eggs into small, medium and large, Margi farms packs the eggs that weigh more than 4.25 ounces in packages marked " large" and the eggs that weigh less than 2.45 ounces in packages marked " small" the remainder are packed in packages marked " medium". If a day's packaging contained 10.56% large and 4.01% small eggs, calculate the mean and the standard deviation of the weights of eggs ( Assume that the distribution egg weights is normal)

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Solution Summary

The mean and standard deviation are calculated with the help of two equations.

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The solution file is attached.

x1 = 4.25, x2 = 2.45, z = (x - )/ ...

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