According to the American Marketing Association, in one month, 29% of social media users were between 25 and 34 years old. If a random sample of nine adults was selected. d. What are the mean and...

According to the American Marketing Association, in one month, 29% of social media users were between 25 and 34 years old. If a random sample of nine adults was selected.

d. What are the mean and standard deviation for this distribution?

The mean is