Question: With reference to Example 11, verify that the predicted drying time is minimum when the amount of additive used is 5.1 grams. Data From Example

With reference to Example 11, verify that the predicted drying time is minimum when the amount of additive used is 5.1 grams.

Data From Example 11

EXAMPLE II Fitting a quadratic function by the method of least squares

The following are data on the drying time of a certain varnish

EXAMPLE II Fitting a quadratic function by the method of least squares The following are data on the drying time of a certain varnish and the amount of an additive that is intended to reduce the drying time: Amount of varnish additive (grams) x Drying time (hours) y 12.0 10.5 01234567 10.0 8.0 7.0 8.0 7.5 8.5 8 9.0

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