Statistical skills

Question 1

Easy

Using the data in Figure 5, calculate the interquartile range of the river sediment size data.

Show your working in the space below.

Figure 5: River sediment size at Site 2

Sample	Sediment size (mm)
1	20
2	12
3	35
4	15
5	42
6	28
7	10
8	50
9	24
10	18
11	31

A dispersion graph showing river sediment size on the vertical axis (y-axis) ranging from 0 mm to 60 mm with intervals of 10 mm. The 11 data points plotted are 10, 12, 15, 18, 20, 24, 28, 31, 35, 42, and 50.

Interquartile range = ______________ mm

[2]

Statistical skills

Question 1

Figure 5: River sediment size at Site 2

Statistical skills Questions

Statistical skills

Question 1

Figure 5: River sediment size at Site 2

Statistical skills Questions