A recent study investigated the effects of a “Buckle Up Your Toddlers” campaign to get parents to use grocery cart seat belts. Investigators observed a representative sample of parents at grocery stores

A recent study investigated the effects of a “Buckle Up Your Toddlers” campaign to
get parents to use grocery cart seat belts. Investigators observed a representative
sample of parents at grocery stores in a large city, and found 192 out of 594 parents
buckling up their toddlers.
a) Compute an estimate of the population proportion of all parents who buckle up
their toddlers.