The Martin family goes out for frozen yogurt to celebrate the last day of school. The costs of their frozen yogurts are $1, $1, $2, and $4. Select True or False for each statement.

7a. The mean cost for the frozen yogurts can be found by adding each cost and dividing that total by 4.

7b. The mean cost of the four frozen yogurts is $2.

7c. The difference between the greatest cost and the mean is $1.

7d. The difference between the least cost and the mean is $1.

The histogram shows the amount of time students spent on homework for the week. For numbers 8a–8d, choose True or False to indicate whether the statement is correct.

8a. The number of students that spent between 30 minutes and 59 minutes on homework is 2.

8b. The greatest number of students spent between 90 minutes and 119 minutes on homework.

8c. Five of the students spent less than 60 minutes on homework for the week.

8d. Six of the students spent 60 minutes or more on homework for the week.