Question: 3.8 Consider the data shown below. Suppose that we are considering fitting the nonlinear model to these data. x y 0.5 0.68 1.58 12 0.45

3.8 Consider the data shown below. Suppose that we are considering fitting the nonlinear model to these data. x y 0.5 0.68 1.58 12 0.45 2.66 2.50 2.04 4 6.19 7.85 8 56.1 54.2 9 89.8 90.2 10 147.7 146.3

(a) Discuss how you would find starting values for the parameter estimates.

(b) Fit the model to the data.

(c) Test for significance of regression.

(d) Estimate the error variance o.

(e) Test the hypotheses Ho: B = 0 and Ho: B20. Are the model parameters different from zero? If not, refit an appropriate model.

(f) Analyze the residuals from this model and comment on model adequacy.

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