Question

9-3 74 4. l point) Caleulate the correlation coefficient r. This table is intended to help you set up the caleulation the correlation coefficient by hand. If you'd like to use your T1-34 instead go for it Column A:Colume B: The x deviations from The y deviations from the mean: (x,-x)the mean: -y B: Multiply the values in the Columas A and B. The product of the deviations. 3.5-7.65- 4.15 62-7.65 =-1.45 9.5-7.65-1.85 11.4-7.65 3.75 Sum the above rows for Now to finish the calculation for r, multiply the summed value (last cell above) 1-1-5) Which of the following values is the correct correlation coefficient? a. -0.3845 b. -0.9433 e. 0.9516 d. 0.5788 3. (3 points total) Suppose at a large company 100 employees are randomly selected and asked how many years of experience they have at their current position and their annual salary. The company would like to investigate the relationship between these two variables; number of years experience in current position and annual salary. Answer the following questions: a. (1 point)Which variable should be considered the explanatory variable? Explain b. (2 points) Would you expect the relationship between these two variables to be positive or negative? Explain.

Answer 1