A weight-loss clinic advertised that last month its patients, on average, lost 8lb. Assuming that average refers to the mean, which of the following claims must be true based on this information?

Note: More than one statement could be true. If none of the statements is true, mark the appropriate box.

Two months ago at least one of their patients lost at least 8lb.

Last month all of their patients lost at least 8lb.

Last month, the number of their clients who lost less than 8lb was equal to the number of their clients who lost more than 8lb.

Last month at least one of their patients lost less than 2lb.

Last month some of their patients lost exactly 8lb .

None of the above statements are true.