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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
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>a) Product moment correlation coefficient = 0.115
>b) Critical value: 0.5067
> Therefore no correlation
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