1. Correlations
LO:
To be able to analyse the relationship between co-variables
The know the difference between correlations and experiments
To be able to analyse and interpret correlations and correlation coefficients

2. What is a correlation? What is a positive correlation?
A negative correlation?
Which is a stronger correlation: -.68, .42, or .09?
What does a +1.0, 0, and a -1.0 correlation indicate?

3. Variables in a correlation
2 co-variables
No IV and no DV
Relational
Numerical/Not categorical
Scattergraph
Alternative- NOT experimental hypothesis

4. Conducting Correlations

5. Plotting Data Plot the data onto a scattergraph.
6 rules for drawing scattergraphs…
Label axis
Appropriate title
Appropriate graph
Correctly plotted data
Correct intervals on axis
Line of best fit- not through zero!

6. The Correlation Coefficient
The correlation coefficient tells us how closely data in a scattergraph falls along a straight line.
The closer the value is to 1, the more aligned or related the data is.
1 or -1 tells us that the data set is perfectly aligned/related.
Data sets close to zero show little to no relationship.
What would you estimate to be the Correlation Coefficient?
What does this mean?

7. Drawing a Conclusion Which hypothesis do you accept or reject?
What does this mean?

8. Why would we ever use a correlation?
Strengths
Weaknesses

9. Complete… Can you be too laid back?
HW: A correlational crossword study

10. Describe the Correlation
What does
It indicate?

11. Describe the Correlation
What does
It indicate?

12. Describe the Correlation

13. Describe the Correlation

14. Draw the Correlation
+ 1

15. Draw the Correlation -1

16. Draw the Correlation

17. Draw the Correlation
+0.8

18. Draw the Correlation
-0.2

19. Draw the Correlation
+0.5