Quick Review Of Some Inference For Linear Regression Concepts
-
How do you know that you should attempt to use a linear regression method for predicting y values from x values?
-
When the moon is full.
-
When Mrs. Linner gives you the evil eye.
-
When the data look linear when graphed in a scatterplot.
-
When the relationship should (theoretically) be linear.
-
Either C or D will suffice.
-
Inference and modeling concepts for AP Statistics students
Quiz Preview
- 2.
How do you know that your linear model was a wise choice (the linear model is the correct model)?
-
When I flip a coin and it lands heads up.
-
When I have run out of other models to try.
-
When the r^2 value is close to 1.
-
When the graph of the residuals(x, y - y-hat)forms a straight line.
-
When the residuals(x, y - y-hat)are small and scattered(no pattern).
Correct Answer
A. When the residuals(x, y - y-hat)are small and scattered(no pattern). -
- 3.
When do you know that the model is a close fit to the data?
-
When I flip a coin and it lands heads up.
-
When I have run out of other models to try.
-
When the r^2 value is close to 1.
-
When the graph of the residuals(x, y - y-hat)forms a straight line.
-
When the residuals(x, y - y-hat)are small and scattered(no pattern).
Correct Answer
A. When the r^2 value is close to 1. -
- 4.
When is the relationship between x and y too strong to assume that the slope of the best fit line (Beta) is possibly zero?
-
When the confidence interval for the slope does not contain the value 0.
-
When the p value of the linear regression t-test is very small.
-
When the residuals are small and scattered.
-
When the r^2 value is close to 1
-
Answers A or B will suffice.
Correct Answer
A. Answers A or B will suffice. -
- 5.
Given r, sx, and sy you can calculate
-
Beta
-
Alpha
-
B
-
S
-
SE of b
Correct Answer
A. B -
- 6.
Given s, sx, and n you can calculate
-
Beta
-
Alpha
-
B
-
R
-
SE of b
Correct Answer
A. SE of b -
- 7.
Given b and SE of b you still need to know _______________ to calculate the t-statistic and the p-value.
-
R
-
N
-
Df
-
A
-
B or C
Correct Answer
A. B or C -
Quiz Review Timeline (Updated): Mar 22, 2022 +
Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.
-
Current Version
-
Mar 22, 2022Quiz Edited by
ProProfs Editorial Team -
Apr 30, 2007Quiz Created by
Linnerstats
Back to top