posted by tea .
7. A recent study investigated the effects of a "Buckle Up Your Toddlers" campaign to get parents to use the grocery cart seat belts. When gathering baseline data prior to the campaign, investigators observed 86 out of 640 parents buckling up their toddlers. Assume it is reasonable to regard this sample as representative of the population of parents with toddlers.
a) Compute a point estimate of the true proportion of all parents who buckle up their toddlers. (2 pts)
b) Construct and interpret a 92% confidence interval for , the true proportion of all parents who buckle up their toddlers. (6 pts)