6/14/25, 9:49 AM Graded Quiz 4
Topic 8: Analysis of Variance
Started on Saturday, June 14, 2025, 10:43 AM
State Finished
Completed on Saturday, June 14, 2025, 10:48 AM
Time taken 5 mins 29 secs
Grade 40.00 out of 40.00 (100%)
Question 1
A shop owner uses linear regression to predict the number of ice cream cones sold based on the
Correct temperature at noon. The regression equation is ŷ = -20 + 0.5x, where x is the temperature in
4.00 points out degrees Fahrenheit. What does the slope of 0.5 represent in this context?
of 4.00
Select one:
a. For every 0.5°F increase in temperature, the shop sells one more ice cream cone on average.
b. The shop sells 0.5 ice cream cones when the temperature is zero degrees.
c. The maximum number of ice cream cones sold is 0.5.
d. For every 1°F increase in temperature, the shop sells 0.5 more ice cream cones on
average.
Question 2
Which of the following best describes the term "least-squares regression line" in the context of
Correct linear regression?
4.00 points out
of 4.00 Select one:
a. It is the line that has the maximum possible slope among all possible lines.
b. It is the line that best fits the data by maximizing the correlation coefficient.
c. It is the line that passes through all the data points in a scatter plot.
d. It is the line that minimizes the sum of the squared differences between the observed
values and the values predicted by the line.
Topic 8: Analysis of Variance
Started on Saturday, June 14, 2025, 10:43 AM
State Finished
Completed on Saturday, June 14, 2025, 10:48 AM
Time taken 5 mins 29 secs
Grade 40.00 out of 40.00 (100%)
Question 1
A shop owner uses linear regression to predict the number of ice cream cones sold based on the
Correct temperature at noon. The regression equation is ŷ = -20 + 0.5x, where x is the temperature in
4.00 points out degrees Fahrenheit. What does the slope of 0.5 represent in this context?
of 4.00
Select one:
a. For every 0.5°F increase in temperature, the shop sells one more ice cream cone on average.
b. The shop sells 0.5 ice cream cones when the temperature is zero degrees.
c. The maximum number of ice cream cones sold is 0.5.
d. For every 1°F increase in temperature, the shop sells 0.5 more ice cream cones on
average.
Question 2
Which of the following best describes the term "least-squares regression line" in the context of
Correct linear regression?
4.00 points out
of 4.00 Select one:
a. It is the line that has the maximum possible slope among all possible lines.
b. It is the line that best fits the data by maximizing the correlation coefficient.
c. It is the line that passes through all the data points in a scatter plot.
d. It is the line that minimizes the sum of the squared differences between the observed
values and the values predicted by the line.
