Mean, mode and median
Answers are for parents and teachers.
1
Find the mean of 6, 9, 10, 15.
10
2
Find the mode and median of 4, 1, 4, 7, 9, 4, 1.
mode 4, median 4
3
15 pupils got 4 and 10 pupils got 5. Find the mean grade.
4.4
4
Find the median and range of the series 2, 5, 6, 9, 11, 14.
median 7.5; range 12
5
Why does the range show how spread out the data are?
Because it gives the distance between the extreme values: a large range means the values are far apart.