The management of Discount Furniture, a chain of discount furniture stores in the Northeast dwsigned an incentive plan for sales people. To evaluate this innovative plan, 12 salespeople were selected at random and their weekly incomes before and after the plan were recorded.
Salesperson Before After
Malone $320 $340
Quick 290 285
Jackson 421 475
Jones 510 510
Sloan 210 210
Walker 402 500
Mancuso 625 631
Loma 560 560
Cuso 360 365
Utz 431 431
Kushner 506 525
Lawton 505 619
Was there a significant increase in the typical salesperson's weekly income due to the innovative incentive plan? Use the .05 significance level. Estimate the p-value, and interpret it.