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Chapter 13: Q.18 (page 765)
What is?
The value of.
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There are five basic assumptions that must be fulfilled in order to perform a one-way ANOVA test.
Write the final assumption.
A grassroots group opposed to a proposed increase in the gas tax claimed that the increase would hurt working-class people the most, since they commute the farthest to work. Suppose that the group randomly surveyed individuals and asked them their daily one-way commuting mileage. The results are in Table 13.22. Using a significance level, test the hypothesis that the three mean commuting mileages are the same.
Two coworkers commute from the same building. They are interested in whether or not there is any variation in the time it takes them to drive to work. They each record their times for commutes. The first worker’s times have a variance of . These coworkers' times have a variance of . The first worker thinks that he is more consistent with his commute times. Test the claim at the % level. Assume that commute times are normally distributed. What is the p-value?
What is the for the numerator?
The data shown is the recorded body temperatures of subjects as estimated from available histograms. Traditionally we are taught that the normal human body temperature is F. This is not quite correct for everyone. Are the mean temperatures among the four groups different? Calculate confidence intervals for the mean body temperature in each group and comment about the confidence intervals.
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