In a class of 30 students, the average family size is found to be 4 based on collected data. If one student reports incorrectly, yielding a total of 32 members, what was the average now?

What is the mean of the numbers 4, 8, and 12?

Which of the following represents a characteristic of the mean?

If the mean of the data set {5, 10, 15, 20} is 12.5, which statement is true?

What happens to the mean if a new number much larger than the current mean is added?