Question 1

the line of best fit is: Predicted temperature = 100 - 5 * Minutes Interpret the slope

options:

• As the number of minutes go up by 1 the temperature increases by 100 degrees
• As the number of minutes go up by 1 the temperature decreases by 5 degrees
• As the temperature goes up by 1 the number of minutes decreases by 5
• As the temperature goes up by 1 the number of minutes increases by 100

Question 2

the line of best fit is:

Predicted Score = 7 + 4 * hours

A player that trains for 4 hours is expected to score [____] points.

options:

Question 3

The regression line is: = 0.84 - 0.13 * X what can we say about the correlation

options:

• negative
• positive
• Strong correlation
• Weak correlation
• Moderate correlation

Question 4

Given that the correlation between X and Y is -0.48, the mean and standard deviation of X are 3.4 and 8.3, the mean and the standard deviation of Y is 6.5 and 7.2 respectively. Find the slope for the line of best fit. [____] round to 2 d.p.

Question 5

Given that the correlation between X and Y is -0.48, the mean and standard deviation of X are 3.4 and 8.3, the mean and the standard deviation of Y is 6.5 and 7.2 respectively. Find the y-intercept for the line of best fit. [____] round to 1 d.p.

Question 6

the line of best fit is:

predicted debt = 5000 - 100 * number of months

Calculate the residual for a person who has been paying for a year and has a debt of $3765. $[____]

Question 7

Linear model:

predicted grade = 93 - 3 * (number of shows watched)

r = - 0.8

How much variation is accounted for by the model? [____]%

Question 8

predicted y = - 3.84 * x + 7.81

R²= 49%

The correlation between X and Y is [____]

Question 9

predicted y = 2.2 + 1.2 x

R²= 77.44%

The sum of all 56 residuals is [____]

Question 10

Based on the residual plot we can say that it seems the model

options:

• is a good fit because there is NO apparent pattern.
• is NOT a good fit because there is an apparent pattern.
• is a good fit because there is an apparent pattern.
• is NOT a good fit because there is NO apparent pattern.