A university professor tracks the mean final grade and class size of her first-year statistics classes over a number of years to determine if class size affects student performance . The results of the professor's analysis are shown below .
A university professor tracks the mean final grade and class size of her first-year statistics classes over a number of years to determine if class size affects student performance . The results of the professor's analysis are shown below .
Chapter1: Making Economics Decisions
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A university professor tracks the mean final grade and class size of her first-year statistics classes over a number of years to determine if class size affects student performance . The results of the professor's analysis are shown below .
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online-test/#7
A university professor tracks the mean final
grade and class size of her first-year statistics
classes over a number of years to determine if
class size affects student performance.
The results of the professor's analysis are shown
below.
Mean Final
Grade vs. Class Size
r=-0.81
G =-0.092s + 79.285
(G: mean grade (%), s: class size
es
120
Clas Se
a) Identify the independent and dependent variables.
b) Describe the correlation in words ("As..").
c) Interpret the correlation coefficient (r value).
d) Interpret the regression equation (line of best fit).
e) Predict the mean final grade for a class size of 40 students.
f) Are you interpolating or extrapolating in question e?
(A)
ASUS
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