Refer to Exercise 11.7 and data set EX1107. a. Find a 90% confidence interval for ....

Refer to Exercise 11.7 and data set EX1107.

a. Find a 90% confidence interval for .

b. Find a 90% confidence interval for the difference .

Reference:

These data are observations collected using a completely randomized design:

a. Calculate CM and Total SS.

b. Calculate SST and MST.

c. Calculate SSE and MSE.

d. Construct an ANOVA table for the data.

e. State the null and alternative hypotheses for an analysis of variance F-test.

f. Use the p-value approach to determine whether there is a difference in the three population means.