Assignment:
Question 1. Use the normal distribution to approximate the binomial distribution and find the probability of getting 15 to 18 heads out of 25 flips. Compare this to what you get when you calculate the probability using the binomial distribution.
Write your answers out to four decimal places.
Question 2. Facebook provides a variety of statistics on its Web site that detail the growth and popularity of the site.
On average, 28 percent of 18 to 34 year olds check their Facebook profiles before getting out of bed in the morning.
Suppose this percentage follows a normal distribution with a standard deviation of five percent.