POLS625

Assignment 18

Correlation

 

Analyze the relationship between x and y.

1.     What is the null hypothesis?

2.     Calculate Pearsonís correlation coefficient (r) manually.

3.     Calculate Pearsonís correlation coefficient (r) using Excel.

4.     Interpret the correlation coefficient (r).

Strength?

Direction?

5.     Find out if there is a statistically significant relationship between x and y manually.

6.     Replicate the results using SPSS. Do not include any unnecessary or wrong output.

           Highlight the significance. What confidence level is it reaching? Write the answer next to the significance.

                        *Visit the course web page and find an example of SPSS output:

                                Output

  

 

 

x

y

8

25

9

37

3

12

5

32

7

22

8

31

9

30

10

30

9

15