# Question

Draw a scatter diagram (of 10 points) on a sheet of paper that represents a moderately positive correlation between the variables. Now drop your pencil at random on this scatter diagram.

(a) If you think of your pencil as a regression line, what aspect of the regression line are you changing as you move the pencil vertically on the paper?

(b) What aspect of the regression line are you changing as you twist, or rotate, your pencil?

(c) If you didn’t remember any of the equations for the slope and intercept, how could you tell if your pencil was forming the optimal regression line?

(a) If you think of your pencil as a regression line, what aspect of the regression line are you changing as you move the pencil vertically on the paper?

(b) What aspect of the regression line are you changing as you twist, or rotate, your pencil?

(c) If you didn’t remember any of the equations for the slope and intercept, how could you tell if your pencil was forming the optimal regression line?

## Answer to relevant Questions

If, as a result of ongoing changes in the role of women in society, we saw a change in the age of childbearing such that the high-risk fertility rate jumped to 70 in Exercise 10.1, what would we predict for the incidence of ...The mean Stress score in Table 10.2 was 21.467. What would your prediction be for a Stress score of 21.467? How does this compare to the mean Symptom score? Use the table of random numbers (Table E.9 in the Appendix) to generate data for 10 cases on six variables, and label the first variable Y and the following variables X1, X2, X3, X4, and X5. Now use any regression program to ...In examples like the Guber study on the funding of education, we frequently speak of variables like PctSAT as “nuisance variables.” In what sense is that usage reasonable here, and in what sense is it somewhat ...Using the output from Exercise 11.8, interpret the results as if they were significant. (What is one of the reasons that this current analysis is not likely to be significant, even if those relationships are reliable in the ...Post your question

0