A nutritionist found that in a sample of 80 families, 25% indicated that they ate fruit at

Question:

A nutritionist found that in a sample of 80 families, 25% indicated that they ate fruit at least 3 times a week. Find the 99% confidence interval of the true proportion of families who said that they ate fruit at least 3 times a week. Would a proportion of families equal to 28% be considered large?