4.3

(a) If you are using the software R to solve these exercises, use the method given in Section 2.8 to obtain SEs for the following results from the split-plot experiment to compare commercial brands of ravioli:

(i) the difference between the means for treatments ‘Brand C, Assessor FAB’ and

‘Brand C, Assessor ANA’

(ii) the difference between the means for Brand C and Brand B

(iii) the difference between the means for Assessor ANA and Assessor FAB

(iv) the mean for treatment ‘Brand B, Assessor ANA’
(v) the mean for Brand B (vi) the mean for Assessor ANA.