Solution-HW3

# Solution-HW3 - MGMT 305 Homework #3 Page 1 of 3 MGMT 305...

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MGMT 305 Homework #3 Page 1 of 3 MGMT 305 Spring 2007 Assignment 3 Solution (Chapter 9) Chapter 9 7. (10 pts) a. H 0 : μ 8000 H a : > 8000 Research hypothesis to see if the plan increases average sales. (4pts) b. Claiming > 8000 when the plan does not increase sales. A mistake could be implementing the plan when it does not help. (3pts) c. Concluding 8000 when the plan really would increase sales. This could lead to not implementing a plan that would increase sales. (3pts) 17. (15pts) a. H 0 : = 39.2 H a : 39.2 (3pts) b. 0 38.5 39.2 1.54 / 4.8/ 112 x z n σ - - = = = - (3pts) p -value = 2(.5000 - .4382) = .1236 (3pts) c. p -value > .05, do not reject H 0 . We cannot conclude that the mean length of a work week has changed. (2pts) d. Reject H 0 if z < -1.96 or z > 1.96 z = -1.54; cannot reject H 0 (4pts) 28. (12pts) a. H 0 : 3530 H a : > 3530 (3pts) b. 0 3740 3530 2.49 / 810 / 92 x z s n - - = = = (because n=92, large sample) By z table, p-value = .5 - .4936 = .0064

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## This note was uploaded on 06/29/2008 for the course MGMT 305 taught by Professor Priya during the Spring '08 term at Purdue University-West Lafayette.

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Solution-HW3 - MGMT 305 Homework #3 Page 1 of 3 MGMT 305...

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