A student at a junior college conducted a survey of 20 randomly selected full-ti

Question

A student at a junior college conducted a survey of 20 randomly selected full-time students to determine the relation between the number of hours of video game playing each week, x, and grade-point average, y. She found that a linear relation exists between the two variables. The least-squares regression line that describes this relation is y = 0.0512x + 2.9246. (a) Predict the grade-point average of a student who plays video games 8 hours per week The predicted grade-point average is (Round to the nearest hundredth as needed.) (b) Interpret the slope. For each additional hour that a student spends playing video games in a week, the grade point average will by points, on average (c) If appropriate, interpret the y-intercept. A. The grade-point average of a student who does not play video games is 2.9246. B. The area number of video games played in a week by students is 2.9246. C. cannot be interpreted without more information. (d) A student who plays video games 7 hours per week has a grade-point average of 2.45. Is the students grade-pointaverage above or below average among all students who play video games 7 hours per week? The student's grade-point average is average for those who play video games 7 hours per week.

Explanation / Answer

a) For x = 8,

y = -0.0512(8) + 2.9246

y = 2.52

b) Decreases; 0.0512

c) Option A

d) Below

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