Question

A group of 6 students was asked, "How many hours did you watch television last week?" Here are their responses.

16, 4, 8, 9, 7, 17
Find the mean number of hours for these students.
If necessary, round your answer to the nearest tenth.
hours

Answer 1

10.2 hours is the mean. The total number of hours watched was 61 hours. Take 61 hours and divide this total by 6, which was how many people watched tv. 6 x 10 is 60. There is 1 hour left over, which amounts to 1/6. 1/6 is .166……..6. Therefore the 6 rounds the tenths into an additional tenth. This makes the number of hours rounded to 10.2. Not rounded, would be 10.66666666………..