Question: A local police agency claims that the proportion of violent crimes by persons younger than 21 is less than the proportion of violent crimes by persons older than 21. Among 150 randomly selected arrests of persons younger than 21, 5 were listed as violent crimes. Among 225 randomly selected older persons arrested, 10 of the crimes were reported as violent.

Find the standard error of the difference of the two proportions.

Construct a 95% confidence interval for this instance

Choose the conclusion to the claim that the proportion of violent crimes by persons younger than 21 is less than the proportion of violent crimes committed by persons older than 21.

The data indicates a difference in proportions

The data does not indicate a difference in proportions.