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20. To compare the cost of three shipping methods, a random sample of four shipments is taken for each of three firms. The cost
20. To compare the cost of three shipping methods, a random sample of four shipments is taken for each of three firms. The cost per shipment is shown below. SpeedyShip GetltThere WeRTops 355 435 422 518 342 441 402 488 361 430 435 528 In a one-factor ANOVA, the degrees of freedom for the within-groups sum of squares will be (a) 11 (b) 3 (c) 9 (d) 2
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