Refer to the Harris Corporation/ University of Florida comparison of the mean process voltage readings at two locations, Exercise 7.46. The data for 30 production runs at both the old and new locations are saved in the VOLTAGE file. The SAS printout of the analysis is reproduced below. Find and interpret the p-value for the test to compare the mean process voltage readings. What do you conclude? Does your answer agree with Exercise 7.46?

Data from Exercise 7.46

Refer to the Harris Corporation/ University of Florida study to determine whether a manufacturing process performed at a remote location can be established locally, Exercise 2.72. Test devices (pilots) were set up at both the old and new locations and voltage readings on 30 production runs at each location were obtained. The data are reproduced in the table.

Transcribed Image Text:

Sample Statistics Group N Mean Std. Dev. Std. Error NEW OLD 30 9.422333 30 9.803667 0.4789 0.5409 0.0874 0.0988 Hypothes is Test Null hypothesis: Alternative: Mean 1 - Mean 2 = 0 Mean 1 - Mean 2 *= 0 If Variances Are t statistic Df Pr > t Equal Not Equal -2.891 -2.891 58 57.16 0.0054 0.0054 90z Confidence Interval for the Difference between Two Means Lower Limit Upper Limit -0.60 -0.16