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For each of the following problems, assume that the homogeneity of variance assumption has not been met and that you will need to use the adjusted Welch statistic. For each problem, compute a Welch F-statistic and determine whether or not significant differences exist among the treatment conditions.
Group 1
Group 2
Group 3
48
51
61
50
62
53
52
60
63
1. What is your computed F-statistic?
2. What was the critical F value chosen?
3. Is there a significant difference between the groups?
The data in the scatterplot below are an individual's weight and the time it takes (in seconds) on a treadmill to raise his or her pulse rate to 140 beats per minute. The o's correspond to females and the +'s to males.
Their resting heart rates were measured. A partial ANOVA table is given.
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Which of the following would have a binomial distribution and evaluate the binomial coefficient
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LSAT scores are normally distributed, with a mean of 150 and s = 10.
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Subjects at both sites were classified as dropouts if they left the study before the conclusion, or completers if they finished the study
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