In a survey of adults, 68% thought that DNA test for identifying an individual were very reliable. You randomly select 24 adults and ask each if he or she thinks DNA test for identifying an individual are very reliable.
a. Decide whether or not you can use the normal distribution to approximate the binomial distribution in this case. If so, find the mean and standard deviation, If not, explain why.
b. Find the probability that at most 15 people say DNA tests for identifying an individual are very reliable.