If you have forgotten what the mean, median, and mode are, refer to problem MC1 3-85.
Making a stem-and-leaf plot might be helpful.
Median: 15 minutes
Mode: 0 minutes
Some days Gregory's friends spend 2 hours online, and some days they spend no time online. Look at the values of the mean, median, and mode. Do any of these seem to be the best balance between 2 hours and no time? This may help you in answering this problem.