In a market research study, members of a consumer test panel are asked to rate the visual appeal (on a 1 to 10 scale) of the texture of dashboard plastic trim in a mockup of a new fuel cell car. The manufacturer is testing four finish textures. Panelists are assigned randomly to evaluate each texture. The test results are shown below. Each cell shows the average rating by panelists who evaluated each texture. Research question: Is mean rating affected by age group Texture and/or by surface type?
Answer to relevant QuestionsThis table shows partial results for a one-factor ANOVA, (a) Calculate the F test statistic. (b) Calculate the p-value using Excel's function = F.DIST.RT (F,DF1,DF2). (c) Find the critical value F .05 from Appendix F or ...Air pollution (micrograms of particulate per ml of air) was measured along four freeways at each of five different times of day, with the results shown below. (a) What kind of ANOVA is this (one-factor, two-factor, ...Consider a one-factor ANOVA with n1 = 9, n2 = 10, n3 = 7, n4 = 8. (a) How many possible comparisons of means are there? (b) State the degrees of freedom for Tukey's T. (c) Find the critical value of Tukey's T for α = .05. Refer back to the regression equation in exercise 12.12: NetIncome = 2,277 + .0307 Revenue. Recall that the variables are both in millions of dollars. (a) Calculate the residual for the x, y pair ($41,078, $8,301). Did the ...Phone Hold Time for Concert Tickets in Seconds (a) Perform a regression using MegaStat or Excel. (b) State the null and alternative hypotheses for a two-tailed test for a zero slope. (c) Report the p-value and the 95 percent ...
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