MGMT305-HW 4_solutions - MGMT305 HW 4 Solutions Chapter 10 Problems 14 a H0 Ha b c = 87.55 Rounding down we will use a t distribution with 87 degrees of

MGMT305-HW 4_solutions - MGMT305 HW 4 Solutions Chapter 10...

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MGMT305 HW 4- Solutions Chapter 10 Problems 14. a. H 0 : H a : b. c. = 87.55 Rounding down, we will use a t distribution with 87 degrees of freedom. From the t table e see that t = -2.41 corresponds to a p -value between .005 and .01. Exact p -value corresponding to t = -2.41 is .009. d. p -value .05, reject H 0 . We conclude that the salaries of staff nurses are lower in Tampa than in Dallas. 16. a. μ 1 = population mean verbal score parents college grads μ 2 = population mean verbal score parents high school grads H 0 : H a : H a : b. = 525 - 487 = 38 points higher if parents are college grads c. Use df = 25 Using t table, p -value is between .025 and .05 Exact p -value corresponding to t = 1.80 is .0420 d. p -value .05, reject H 0 . Conclude higher population mean verbal scores for students whose parents are college grads. 17. a. H 0 : H a : b. c. Use df = 16 Using t table, p -value is between .025 and .05 Exact p -value corresponding to t = 1.99 is .0320 d. p -value .05, reject H 0 . The consultant with more experience has a higher population mean rating.

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