8. To reach maximum efficiency in performing an assembly operation in a manufacturing plant, new employees require approximately 1-month training period. A new method of training was suggested, and a test was conducted to compare the new method with the standard procedure. The length of time (in minutes) required for each employee to assemble the device was recorded at the end of the 3-week period and the summary results are given below: Standard New Sample size 9. 9. Sample Mean 35.22 31.56 Sample Variance 24.445 20.027 Do you need to make any assumption to obtain the confidence interval for the difference of the mean times of assembling the devices in standard and new procedures? Explain clearly why? Based on your assumption, find a 95% confidence interval for this. Comment on your finding. Justify your method that you used to obtain the interval.

8. To reach maximum efficiency in performing an assembly operation in a manufacturing plant, new employees require approximately 1-month training period. A new method of training was suggested, and a test was conducted to compare the new method with the standard procedure. The length of time (in minutes) required for each employee to assemble the device was recorded at the end of the 3-week period and the summary results are given below: Standard New Sample size 9. 9. Sample Mean 35.22 31.56 Sample Variance 24.445 20.027 Do you need to make any assumption to obtain the confidence interval for the difference of the mean times of assembling the devices in standard and new procedures? Explain clearly why? Based on your assumption, find a 95% confidence interval for this. Comment on your finding. Justify your method that you used to obtain the interval.

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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