A random sample of 11 students produced the following data, where x is the hours spent studying per month, and y is the midterm exam score (out of a maximum of 100 points). The data are presented below in the table of values. x y 9 28 12 43 14 43 16 40 19 46 22 45 25 63 28 76 30 85 31 83 33 78 What is the value of the intercept of the regression line, b, rounded to one decimal place?
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A random sample of 10 students produced the following data, where x is the hours spent studying per month, and y is the exam score (out of a maximum of 100 points). The data are presented below in the table of values. x y 7 30 10 45 12 45 14 42 17 48 20 47 23 65 26 78 28 87 29 85 What is the value of the intercept of the regression line, b, rounded to one decimal place?
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A random sample of 9 students produced the following data, where x is the hours spent per month playing video games, and y is the first-semester grade (out of a maximum of 80 points). The data is presented below in the table of values. x y 16 78 17 72 19 53 21 64 23 64 24 55 25 53 27 38 29 44 What is the equation of the regression line? Select the correct answer below: ŷ = -2.492x + 22.3 ŷ = 12.859x + 22.3 ŷ = 12.859x + 113.5 ŷ = -2.492x + 113.5
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