Practice Problems: Correlation

Item 1

What is the correlation between these two variables:
Stress                Sense of Humor
4                             2
10                             8
12                           11
5                             3
7                             8
6                             7
2                             3
14                           13
SSx = _____
SSy = _____
SSxy = _____
r = _____

Item 2

What is the correlation between these two variables:
Laughter                      Statistics
11                              19
3                                6
5                                6
15                              12
7                                8
6                                7
9                              14

SSx = _____
SSy = _____
SSxy = _____
r = _____

Item 3

How much variance is accounted for between these two variables:

Strength                   Speed
12                           3
9                           7
6                           9
3                         11
1                         15
7                           6

SSx = _____
SSy = _____
SSxy = _____
r = _____
rsquared = _____

Item 4

What is the correlation between these two variables:

Strength                Peace
2                         2
6                         5
7                         8
14                       19
15                       12
9                         8
4                         5

SSx = _____
SSy = _____
SSxy = _____
r = _____
rsquared = _____

Answers

NOW YOU CHOOSE:
Day 5: Correlation
Bit More About Correlation
Even More About Correlation
Calculate Correlation
Practice Problems
More Practice Problems
Word Problems
Sim1 Sim2 Sim3
Sim4 Sim5 Sim6
Sim7 Sim8 Sim9
Basic Facts About Correlation
Vocabulary
Formulas
Quiz 5
Summary