The operations manager of a musical instrument distributor feels that demand for a particular
type of guitar may be related to the number of YouTube views for a music video by the popular
rock group Marble Pumpkins during the preceding month. The manager has collected the data
shown in the following table:
a. Graph these data to see whether a linear equation might describe the relationship between
the views on YouTube and guitar sales.
b. Using the equations presented in this chapter, compute the SST, SSE, and SSR. Find the leastsquares
regression line for these data.
c. Using the regression equation, predict guitar sales if there were 40,000 views last month.
d. Test to see if there is a statistically significant relationship between sales and YouTube views
at the 0.05 level of significance.
e. Using computer software, find the least-squares regression line. Based on the F test, is there
a statistically significant relationship between the demand for guitars and the number of