A school district wants to find out why dropout rates were lower at some schools rather than others.What statistical approach would be most appropriate?

Group of answer choices

A confidence interval with the expected dropout rate as the mean

A regression with dropout rates as the independent variable

A hypothesis test with a null hypothesis that the dropout rate is less than or equal to the highest dropout rate

A hypothesis test with a null hypothesis that the dropout rate is more than the highest dropout rate

A regression with dropout rates as the dependent variable