The analysis in Exercise 25 uses South America as the omitted category. What would change and what would be the same had the analysis used the United States as the omitted reference category?
Answer to relevant QuestionsConsider the data shown in the following plot. Each group has 12 cases. Do the means appear statistically significant? Estimate the p-value: Is it about 0.5, about 0.05, or less than 0.0001? A line of men’s shirts was offered in a chain of retail stores at three prices: $32, $35, and $40. Weekly sales were monitored, producing totals at 30 stores in the chain (10 at each price). Which produces a higher R2: a ...Suppose that different amounts of fertilizer had been used in different fields that were involved in the wheat trials. (a) Explain how the use of different amounts of fertilizer confounds the experimental analysis in the ...Because an ANOVA does not presume a linear trend, it can be used to check for deviations from the straight-enough condition. The procedure requires replicated observations; we need several values of y at each value of x. The ...1. The average cost for rushed jobs is less than the average cost for those not rushed ($40.43 versus $38.59). Usually, having to do things in a hurry increases costs. Add the dummy variable D(Rush) to the stepwise model. ...
Post your question