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A college looks at the grade point average (GPA) of its full-time and part-time students. Grades in science courses are generally lower than grades in other courses. There are few science majors among part-time students but many science majors among full-time students. The college finds that full-time students who are science majors have higher GPAs than part-time students who are science majors. Full-time students who are not science majors also have higher GPAs than part-time students who are not science majors. Yet part-time students as a group have higher GPAs than full-time students. This finding is
(a) not possible: if both science and other majors who are full-time have higher GPAs than those who are part-time, then all full-time students together must have higher GPAs than all part-time students together.
(b) an example of Simpson's paradox: full-time students do better in both kinds of courses but worse overall because they take more science courses.
(c) due to comparing two conditional distributions that should not be compared.
Excluding the combination that includes all the variables, which variables would you consider to include into the model based on Mallows Cp criterion?
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In effect, she wanted to determine if there was a relationship between FCAT Science Standardized score and FCAT Reading Standardized score.
suppose three fair dice are rolled at the same time.a what is the probability that at least one number will be less
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A study of 35 professors showed that the average time they spent creating test questions was 13.5 minutes per question. The standard deviation of the population is 3.8. Which of the following is the 99% confidence interval for the average number o..
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