Relationship between Sales and Sales Calls Ava Emma Isabella Emily Madison Number of Systems Sold Joshua Y' = 20.526 + 11.579x Jacob r = 0.71 O 2 W 4 5 Number of Sales CallsRory wanted to evaluate his sales staff. So he compared the predicted number of sales made by each employee with the actual number of sales (as shown in the figure). What should he conclude from this regression analysis? Once we take into account the number of sales calls made, a) Emily is over-performing, while Emma is under-performing O b) Emily is under-performing, while Emma is over-performing Oc) Both Emily and Emma sold 60 systems, so both are over-performing Od) Both Emily and Emma sold 60 systems, so both are under-performingRelationship between Sales and Sales Calls MONO OO O O Y' = 20.526 + 11.579X r = 0.71 4N\" GO '2 O (D m E .2 3. m 40 '6 h o .0 E a 2 O 2 3 Number of Sales Calls Rory wanted to evaluate his sales staff. 50 he compared the predicted number of sales made by each employee with the actual number of sales (as shown in the figure). Rory then added up those residual scores, what value did he find? He found that the sum of the residuals, which can also be written as Zly y') equals O a) zero O b) the value of the mean 0 c) the standard error of the estimate Q d) the standard deviation