Question: Compare regression coefficients. Again refer to Exercise 11.87. DATADATA DATADATADATA DATADATADATADATADATA DATADATADATADATADATA DATADATADATADATADATA DATADATADATADATADATA DATADATADATADATADATA DATADATADATADATADATA DATADATADATA DATADATADATADATADATA DATA FILE LOC1 (a) In Example 10.5

Compare regression coefficients. Again refer to Exercise 11.87. DATADATA DATADATADATA DATADATADATADATADATA DATADATADATADATADATA DATADATADATADATADATA DATADATADATADATADATA DATADATADATADATADATA DATADATADATADATADATA DATADATADATA DATADATADATADATADATA DATA FILE LOC1

(a) In Example 10.5 (page 533), parameter estimates for the model that included just LOC were obtained. Compare those parameter estimates with the ones obtained from the full model that also includes age and gender. Describe any changes.

(b) Consider a 42-year-old male accountant with an LOC of 10.

What is his predicted stress level based on the full model? What about for the model that includes only LOC?

(c) Suppose his LOC changed to 11. How much does this change his job stress level for each model?

(d) In Example 10.13 (page 561), we computed r 2 for the model that included only LOC. It was 0.0975. Use r 2 and R2 to test whether age and gender are helpful predictors, given LOC is already in the model.

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