10.29 Correlation between the prevalences of adult binge drinking and underage drinking.
A group of researchers compiled data on the prevalence of adult binge drinking and the prevalence of underage drinking in 42 states.12 A correlation of 0.32 was reported.
10.29
(a) , the correlation is significantly greater than 0 at the 5% level. (b) States with more adult binge drinking are more likely to have underage drinking. . 10.24% of the variation in underage drinking can be accounted for by the prevalence of adult binge drinking. (c) Even though most states were used, it is assumed that sampling took place for each state; thus, we can still infer about the true unknown correlation (had we obtained different samples from each state, we would have gotten different results).