Hypothesis testing for zero correlation
What to look out for:
- "believes there is no correlation" - two tailed test
- "believes there is a positive/negative correlation" - one tailed test
Large data set hypothesis test
| x | 31 | 28 | 38 | 37 | 18 | 17 | 21 | 29 |
|---|---|---|---|---|---|---|---|---|
| y | 99 | 94 | 87 | 80 | 80 | 89 | 84 | 86 |
| > | ||||||||
| >a) Product moment correlation coefficient = 0.115 | ||||||||
| >b) Critical value: 0.5067 | ||||||||
| > Therefore no correlation |