1. Adriana is a conservationist researching whether there is any correlation between the population sizes of king cobras, $c$, and their biggest enemy, the Indian grey mongoose, $m$. She collects data on population sizes of both species from a random sample of 15 wildlife reserves and calculates the product moment correlation coefficient to be $r=-0.3264$.

Carry out a suitable test to investigate if there is a linear correlation between $c$ and $m$. You should:

• state your hypotheses clearly

• use a 5% level of significance

• state the critical value used