A sports coach investigates the relationship between an athlete's reaction time and time to run 100 metres. For a random sample of 18 athletes, r=0.5217r=0.5217r=0.5217. For a two-tailed test at the 5% level, the critical values are ±0.4683\pm0.4683±0.4683.
State the null and alternative hypotheses.
State the acceptance region for rrr.
Complete the hypothesis test.