Two binomial experiments are listed. Determine whether you can use a normal distribution to approximate the distribution of x, the number of people who reply yes. If you can, find the mean and standard deviation. If you cannot, explain why.

1. In a survey of 8- to 18-year-old heavy media users in the United States, 47% said they get fair or poor grades (C and below). You randomly select forty-five 8- to18-year-old heavy media users in the United States and ask them whether they get fair or poor grades.

2. In a survey of 8- to 18-year-old light media users in the United States, 23% said they get fair or poor grades (C and below). You randomly select twenty 8- to 18-year-old light media users in the United States and ask them whether they get fair or poor grades.