Question
Participant Stress Level (X) Test Score (Y) 1 18 6 2 3 17 3 12 9...
|
Participant |
Stress Level (X) |
Test Score (Y) |
|
1 |
18 |
6 |
|
2 |
3 |
17 |
|
3 |
12 |
9 |
|
4 |
8 |
22 |
|
5 |
15 |
7 |
|
6 |
7 |
11 |
What's the slope of this data (round to two decimal places)?
What's the Y intercept (round to two decimal places)?
What's the predicted test score for a stress level of 10 (round to two decimal places)?
What's the error of participant 5's score (round to two decimal places)?
What's the standard error of the estimate?
What is the coefficient of determination?
Homework Answers
Answer #1
Using the regression function in Excel we get the following data
What's the slope of this data (round to two decimal places)?
-0.853
What's the Y intercept (round to two decimal places)?
20.96
What's the predicted test score for a stress level of 10 (round to two decimal places)?
y(10) = -0.853*10+20.96 = 12.43
What's the error of participant 5's score (round to two decimal places)?
Error = y(5) -x(5) = -0.853*5+20.96 - 7 = 9.695
What's the standard error of the estimate?
using excel function =STEYX(known Y,Known X) = 4.588
What is the coefficient of determination?
r^2 = 0.570
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