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Title: Suppose an algebra professor found that the correlation between study time (in hours) and exam score ... Post by: AllisonHope3 on Mar 3, 2018 Suppose an algebra professor found that the correlation between study time (in hours) and exam score (out of 100) is +.80, and the regression line was found to be y = 20 + 4x. He arrived at this equation through years of collecting data on his students, most of whom reported studying anywhere from 0 to 20 hours for his exams. For which values of study time does the professor's regression equation make sense in terms of predicting exam scores?
a. Between 0 and 20 hours. b. Between 0 and 100 hours. c. Anything greater than or equal to 0 hours. d. It is not possible to predict exam score with study time. Q. 2 Suppose an algebra professor found that the correlation between study time (in hours) and exam score (out of 100) is +.80, and the regression line was found to be y = 20 + 4x. He arrived at this equation through years of collecting data on his students, most of whom reported studying anywhere from 0 to 20 hours for his exams. In order to get a 100 on this exam, how long should students expect to study (minimum)? Q. 3 Suppose an algebra professor found that the correlation between study time (in hours) and exam score (out of 100) is +.80, and the regression line was found to be y = 20 + 4x. He arrived at this equation through years of collecting data on his students, most of whom reported studying anywhere from 0 to 20 hours for his exams. What meaning (if any) does the slope of 4 have in this situation? Use words that a non-statistics student would be able to understand. Q. 4 Suppose an algebra professor found that the correlation between study time (in hours) and exam score (out of 100) is +.80, and the regression line was found to be y = 20 + 4x. He arrived at this equation through years of collecting data on his students, most of whom reported studying anywhere from 0 to 20 hours for his exams. What meaning (if any) does the y intercept of 20 have in this situation? Use words that a non-statistics student would be able to understand. Q. 5 Suppose an algebra professor found that the correlation between study time (in hours) and exam score (out of 100) is +.80, and the regression line was found to be y = 20 + 4x. He arrived at this equation through years of collecting data on his students, most of whom reported studying anywhere from 0 to 20 hours for his exams. Which variable is X and which variable is Y in this situation? Q. 6 If there is no linear relationship between two measurement variables, the correlation is __________. Fill in the blank(s) with correct word Q. 7 The __________ between two measurement variables is an indicator of how closely their values fall to a straight line. Fill in the blank(s) with correct word Title: Suppose an algebra professor found that the correlation between study time (in hours) and exam score ... Post by: SweetMarie1998 on Mar 3, 2018 Content hidden
Title: Suppose an algebra professor found that the correlation between study time (in hours) and exam score ... Post by: AllisonHope3 on Mar 3, 2018 I'm seriously surprised that you found the answers... What's your secret?!
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