Number of calls the salesperson makes

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A tele marketing wants to know if sales go up as they call more people per day but spend less time per call. The following is data from nine randomly selected days. The information is the number of calls the salesperson makes in a day and the total amount of sales (in thousands of dollars).

Calls      25     29     33    37     43     48     52     55     67

Sales     3.7    4.2    4.2    5.0    4.7    5.3    4.9    5.6    5.9

a) Calculate ∑X, ∑X^2, ∑Y, ∑Y^2, ∑XY

b) Calculate SSxx, SSyy, and SSxy

Reference no: EM131235859

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