The management of Discount Furniture, a chain of discount furniture stores in the Northeast, designed an incentive plan for salespeople. To evaluate this innovative plan, 12 salespeople were selected at random, and their weekly incomes before and after the plan were recorded.

Was there a significant increase in the typical salesperson’s weekly income due to the in novative incentive plan? Use the .05 significance level. Estimate the p-value, and interpretit.

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Salesperson Sid Mahone Carol Quick Tom Jackson Andy Jones Jean Sloan Jack Walker Peg Mancuso Anita Loma John Cuso Carl Utz A. S. Kushner Fern Lawton Before S320 290 421 510 210 402 625 560 360 431 506 505 After $340 285 475 510 210 500 631 365 431 525 619