A sales manager has found that salespeople who spend more time per customer call are more successful. The most successful salespeople spend, on the average, 50 minutes per customer call. A random sample of 10 sales calls from the records of a new salesperson reveals the following amounts of time in minutes spent per sales call: 26 28 30 39 40 41 41 57 79 79 4. Develop a 95% confidence interval for the population mean minutes spent per sales call. Show you calculation 5. Does it appear from the results of question 4 that the new salesperson may become one of the firm’s more successful salespeople? Explain.