A student at a junior college conducted a survey of 20 randomly selected full-time students to...
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 = -0.0516x + 2.9389
(a) Predict the grade-point average of a student who plays video games 8 hours per week.
The predicted grade-point average is
Homework Answers
y = -0.0516x + 2.9389
where,
y = grade-point average
x = number of hours of video game playing each week
(a) Predict the grade-point average of a student who plays video games 8 hours per week.
- Thus, x = 8
y = -0.0516*8 + 2.9389
y = 2.5261
Thus,
the predicted grade-point average of a student who plays video games 8 hours per week is 2.5261
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A student at a junior college conducted a survey of 20 randomly
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A prominent university conducted a survey on the effect of
part-time work on student grade point average (GPA). Let x
be the hours worked per week and y the GPA for the year. A
summary of the results is below. What can the university conclude
with α = 0.05?
n = 29
y
= 69
x
= 517
y2
= 189
,
x2
= 11703
yx
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,
y − ŷ
2
= 14
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