According to ESPN, 2018 marked the fourth straight year that the NBA broke its attendance record. Of course, that means the league is more popular overall but it would also be interesting to find out what determines variation in attendance between teams. Is attendance higher for teams that win more? The Excel file NBA.xlsx lists attendance and winning records for the 2018 season for all NBA teams.

a. Using Excel, calculate the correlation coefficient for this sample.

b. Using α = 0.05, perform a hypothesis test to determine if the correlation coefficient is not equal to zero.

c. What conclusions can be drawn about the relationship between attendance and a winning record in the NBA?