4.6 Statistical hypothesis testing (A-level only)

50%

The amount of rainfall ( $x\,$ mm) and the wind speed ( $y\,$ knots) were recorded for 15 days.

The product moment correlation coefficient for these data is calculated to be $r = 0.521$ .

Stating your hypotheses clearly test, at the 5% significance level, whether there is a positive correlation between rainfall and wind speed.

[4]

4.6 Statistical hypothesis testing (A-level only) Questions

50%

The amount of rainfall ( $x\,$ mm) and the wind speed ( $y\,$ knots) were recorded for 15 days.

The product moment correlation coefficient for these data is calculated to be $r = 0.521$ .

Stating your hypotheses clearly test, at the 5% significance level, whether there is a positive correlation between rainfall and wind speed.

[4]