# Question: Redo Exercise 14 61 when the dosage is 20 milligrams Note

Redo Exercise 14.61 when the dosage is 20 milligrams. Note the greatly increased width of the confidence limits for the expected number of deaths and of the limits of prediction. This example illustrates that extrapolation, estimating a value of Y for observations outside the range of the data, usually results in a highly inaccurate estimate.

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