This dot plot shows the number of hours 20 sixth grade students slept on a Saturday night. 4 (1)
6 (2)
6.5(4)
7(4)
7.5(3)
8(5)
8.5(1)
sleep in hours
Select all the true statements about the data used to build the dot plot.
Six students slept for at least 8 hours.
The mean amount of sleep was 6.25 hours.
More than half of the students slept 7 hours or less.
Only 1% of the students slept more than 8 hours.
The difference between the most hours of sleep and the least for these students was 2.5 hours.