a local school board wants to estimate the difference in the proportion of households with school-aged children
that would support starting the school year a week earlier, and the proportion of households without school-aged
children that would support starting the school year a week earlier. they survey a random sample of 40 households
with school-aged children about whether they would support starting the school year a week earlier, and 30
households respond yes. they survey a random sample of 45 households that do not have school-aged children,
and 25 respond yes. assuming the conditions for inference have been met, what is the 90% confidence interval for
the difference in proportions of households that would support starting the school year a week earlier?