A glaciologist suggests that there is a negative correlation between the concentration of a specific microplastic, $p$ parts per billion, in snow samples and the distance, $d$ km, from the nearest research station.

The glaciologist analyzed a random sample of 25 locations and calculated the product moment correlation coefficient (PMCC) between the microplastic concentration and distance to be $- 0.415$ .

Carry out a hypothesis test at the 5% significance level to determine if this sample provides sufficient evidence to support the glaciologist's suggestion.

For $n = 25$ , the critical value for a one-tailed test at the 5% level for the population correlation coefficient is $0.3365$ .

The glaciologist analyzed a random sample of 25 locations and calculated the product moment correlation coefficient (PMCC) between the microplastic concentration and distance to be $- 0.415$ .

Carry out a hypothesis test at the 5% significance level to determine if this sample provides sufficient evidence to support the glaciologist's suggestion.

For $n = 25$ , the critical value for a one-tailed test at the 5% level for the population correlation coefficient is $0.3365$ .

4.3.1 Statistical hypothesis testing (A-level only)

Question 34

Markscheme

4.3.1 Statistical hypothesis testing (A-level only)

Question 34

Markscheme

4.3.1 Statistical hypothesis testing (A-level only)

Question 34

4.3.1 Statistical hypothesis testing (A-level only) Questions

4.3.1 Statistical hypothesis testing (A-level only)

Question 34

4.3.1 Statistical hypothesis testing (A-level only) Questions