# Question

In an article in Public Roads (1983), Bissell, Pilkington, Mason, and Woods study bridge safety (measured in accident rates per 100 million vehicles) and the difference between the width of the bridge and the width of the roadway approach (road plus shoulder):

a. Identify and interpret the least squares point estimate of the slope of the simple linear regression model.

b. Identify and interpret the p-value for testing H0: β1 = 0 versus Ha: β1 ≠ 0.

c. Identify and interpret r2.

a. Identify and interpret the least squares point estimate of the slope of the simple linear regression model.

b. Identify and interpret the p-value for testing H0: β1 = 0 versus Ha: β1 ≠ 0.

c. Identify and interpret r2.

## Answer to relevant Questions

An accountant wishes to predict direct labor cost (y) on the basis of the batch size (x) of a product produced in a job shop. Data for 12 production runs are given in Table 13.5, along with the Excel output from fitting a ...Model: y = β0 + β1x1 + β2x2 + ε Sample size: n = 10 Use the MINITAB output in Figure (d) to do (1) through (6) for each of β0, β1, β2, and β3. What does the parameter multiplied by a dummy variable express? The model using 12 squared and interaction variables has the smallest s. However, if we desire a somewhat simpler model, note that s does not increase substantially until we move from a model having seven squared and ...Post your question

0