Theodore Coladarci and Irv Kornﬁeld from the University of Maine found a correlation of 0.68 between responses to questions on the RateMyProfessors.com Web site and typical in-class evaluations. Use this correlation to make an argument in favor of the validity of RateMyProfessors.com as a legitimate evaluation tool. RateMyProfessors.com also has a chili pepper icon, which is meant to indicate a “hotness scale” for the professor. This hotness scale serves as a proxy for the exiness of the professor. It was found that the correlation between quality and sexiness is 0.64. In addition, it was found that the correlation between easiness of the professor and quality is 0.85 for instructors with at least 70 posts.
Answer to relevant QuestionsExplain what is wrong with the following statement: “We have concluded that a high correlation exists between the gender of drivers and rates of automobile accidents.” Suggest a better way to write the sentence. (a) By hand, draw a scatter diagram treating x as the explanatory variable and y as the response variable. (b) Select two points from the scatter diagram and ﬁnd the equation of the line containing the points selected. (c) ...After the ﬁrst exam in a statistics course, Professor Katula surveyed 14 randomly selected students to determine the relation between the amount of time they spent studying for the exam and exam score. She found that a ...Research performed at NASA and led by Emily R. Morey-Holton measured the lengths of the right humerus and right tibia in 11 rats who were sent to space on Spacelab Life Sciences 2. The following data were collected. (a) ...Match the coefﬁcient of determination to the scatter diagram. The scales on the horizontal and vertical axis are the same for each scatter diagram. (a) R2 = 0.58 (b) R2 = 0.90 (c) R2 = 1 (d) R2 = 0.12
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