analyse if there is any relationships between the number of new clients a broker brings into the firm and the sales gene

analyse if there is any relationships between the number of new clients a broker brings into the firm and the sales generated by the broker.Among others,you are required to apply the regression analysis with references to Table A-1
TABLE A-1
Broker Clients Sales
1 27 52
2 11 37
3 42 64
4 33 55
5 15 29
6 15 34
7 25 58
8 36 59
9 28 44
10 30 48
11 17 31
12 22 38
13.Suppose the managers of the brokerage firm want to obtain a 99% confidence interval estimate for the mean sales made by brokers who have brought into the firm 24 new clients.What is the t critical value they would use.
14.Suppose the managers of the brokerage firm want to obtain a 99% confidence interval estimate for the mean sales made by brokers who have brought into the firm 24 new clients.The confidence interval is from ________ to ________.
补充下题目：The managers of a brokerage firm are interested in finding out if the number of new clients a broker brings into the firm affects the sales generated by the broker.They sample 12 brokers and determine the number of new clients they have enrolled in the last year and their sales amounts in thousands of dollars.These data are presented in the table that follows.