A manufacturer of television sets is interested in the effect on tube conductivity of four different types
Question:
A manufacturer of television sets is interested in the effect on tube conductivity of four different types of coating for color picture tubes. The following conductivity data are obtained:
(a) Is there a difference in conductivity due to coating type? Use α = 0.05.
(b) Estimate the overall mean and the treatment effects.
(c) Compute a 95 percent confidence interval estimate of the mean of coating type 4. Compute a 99 percent confidence interval estimate of the mean difference between coating types 1 and 4.
(d) Test all pairs of means using the Fisher LSD method with α = 0.05.
(e) Use the graphical method discussed in Section 3-5.3 to compare the means. Which coating type produces the highest conductivity?
(f) Assuming that coating type 4 is currently in use, what are your recommendations to the manufacturer? We wish to minimize conductivity.
Step by Step Answer:
asince pvalue is more than alpha005 so there is no difference in conductivity a...View the full answer
