# Question

The tensile strength of a paper product is related to the amount of hardwood in the pulp. Ten samples are produced in the pilot plant, and the data obtained are shown in Table 4E.9.

(a) Fit a linear regression model relating strength to percentage hardwood.

(b) Test the model in part (a) for significance of regression.

(c) Find a 95% confidence interval on the parameter 1.

(a) Fit a linear regression model relating strength to percentage hardwood.

(b) Test the model in part (a) for significance of regression.

(c) Find a 95% confidence interval on the parameter 1.

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