Regression Analysis Name: The following table gives the experience (in years) and the number of computers...

Transcribed Image Text:

Regression Analysis Name: The following table gives the experience (in years) and the number of computers sold during the previous month by seven salespersons. Do you think they are strongly related? Experience Computers sold 4 12 9 6 10 16 7 19 42 28 31 39 35 21 a. Construct a scatter diagram for these data. Does the scatter diagram exhibit a linear relationship between the two variables? Do you think they are strongly related? b. Compute the regression coefficient r. What is the meaning of the sign of r and the value of r? c. Find the least square regression line. Graph the line on the scatter diagram in part a. d. Predict the number of computers sold during the past month by a person with 11 years of experience. e. Construct a 95% confidence interval a person with 11 years of experience. Regression Analysis Name: The following table gives the experience (in years) and the number of computers sold during the previous month by seven salespersons. Do you think they are strongly related? Experience Computers sold 4 12 9 6 10 16 7 19 42 28 31 39 35 21 a. Construct a scatter diagram for these data. Does the scatter diagram exhibit a linear relationship between the two variables? Do you think they are strongly related? b. Compute the regression coefficient r. What is the meaning of the sign of r and the value of r? c. Find the least square regression line. Graph the line on the scatter diagram in part a. d. Predict the number of computers sold during the past month by a person with 11 years of experience. e. Construct a 95% confidence interval a person with 11 years of experience.