Three assembly lines are used to produce a certain component for an airline. To examine the product rate, a random sample of six hourly periods is chosen for each assembly line and the number of components produced during these periods for each line is recorded. The output from a statistical software package is:

Summary

Groups	Count	Sum	Average	Variance
Line A	6	250	41.66667	0.666667
Line B	6	260	43.33333	0.666667
Line C	6	249	41.5	0.7

ANOVA

Source of Variation	SS	DF	MS	F	P-value
Between groups	12.33333	2	6.166667	11.32653	0.001005
Within groups	8.166667	15	0.544444
Total	20.5	17

a. Use a .01 level of significance to test if there is a difference in the mean production of the three assembly lines.

b. Develop a 99% confidence interval for the difference in the means between Line B and Line C.

Class is: EC315 Quantitative Research Methods

Book: Basic Statistics for Business & Economics