Try putting the bedtimes in order from earliest to latest first. This might help you find the measures of central tendency more easily.
Remember that the mode is the most frequently repeated piece of data. What time did Zoe go to bed the most?
In the list of data you made in part (a), the median will be one in the exact middle, between the earliest and latest times.
Because there is an even number of bedtimes listed, take the average time of the two middle times.
If there are 60 minutes in an hour, what portion of an hour is 30 minutes?
You should use 9.5 and 10.5 to find the mean.
The mean is 9.85, which is about 9:51 p.m.
Look at the modes of central tendancy you found in parts (a), (b), and (d).
The earliest time would probably be the best time for Zoe to refer to. Remember to explain your answer!