According to medical data, the probability than an adult US citizen has been diagnosed with high blood pressure is 17%. Suppose you randomly select 57 adults and ask if he or she has been diagnosed high blood pressure .
a. Decide whether you can use the normal distribution to approximate the binomial distribution. If so, find the mean and standard deviation. Round to the nearest hundredth when necessary. If not, please explain why a normal distribution should not be used.
b. Find the probability that no more than 10 of the sampled adults have been diagnosed with high blood pressure using an appropriate method