Question: 9. Mobile Computing Field Study, continued The Mobile Computing Field Study was introduced in Sect. 19.7, and data on an additional response variable, time, was

9. Mobile Computing Field Study, continued The Mobile Computing Field Study was introduced in Sect. 19.7, and data on an additional response variable, time, was provided in Exercise 8. Using model (19.7.18), p. 718, conduct the following analyses of the response variable time, using only the 71 observations available—namely, without estimating and using the missing value. If using SAS software, you may adapt the program in Table 19.21; if using R, you may adapt the program in Tables 19.30 and 19.31.

(a) Provide the resulting variance component estimates.

(b) Test for significance of each treatment factor main effect and interaction. Report the observed significance level of each test, and interpret the results.

(c) Using an appropriate method of multiple comparisons, construct simultaneous 99% confidence intervals for pairwise comparison of the visual presentation formats (B). Interpret the results.

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