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The average birth weight of elephants is 230 pounds. Assume that the distribution of birth weights...

The average birth weight of elephants is 230 pounds. Assume that the distribution of birth weights is Normal with a standard deviation of 50 pounds. Find the birth weight of elephants at the 95th percentile.

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Answer #1

z value at 95% = 1.64

z = (x - mean)/s

1.64 = (x - 230)/50

x = 1.64 * 50 + 230
x = 312

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