According to a recent report, people smile an average of u=62 time per day.

16. According to a recent report, people smile an average of u=62 time per day.  Assuming that the distribution of smiles is approximately normal with a standard deviation of o=18, find each of the following values.

a.  What proportion of people smile more than 80 times a day?

b.  What proportion of people smile at least 50 times a day.