Sarah is the office manager for a group of financial advisors who provide financial services for individual clients. She would like to investigate whether a relationship exists between the number of presentations made to prospective clients in a month and the number of new clients per month. The following table shows the number of presentations and corresponding new clients for a random sample of six employees.

 

a. Calculate the sample correlation coefficient.
b. Test whether the correlation coefficient is significant at 5%.
d. Calculate the Spearman correlation coefficient.
e. Using , determine if the rank correlation is significant.

Employee 1 2 3450 6 Presentations 7 9 9 10 11 14 New Clients 2 3 4 65 5 4