A student wants to estimate the number of daisy plants in a 500 mfield. She uses a 1 m² quadrat to sample the field.
Figure 9 shows the results for the number of daisy plants counted in six areas
sampled with the quadrat
sample
number
number of
daisy plants
mean diameter of
daisy plants/cm
1
5
7
2
2
2
3
6
9
4
3
3
5
4
5
6
4
6
Figure 9
Calculate the mean number of daisy plants for the six samples.
(1)