Note how the range in tree size is influenced by the size of the sample

Population range, N = 320 trees: 36.0 - 4.1 = 31.9 cm

Range for a sample of 10 trees: 32.0 - 12.1 = 19.9 cm

Range for a sample of 20 trees: 32.0 - 12.1 = 19.9 cm

Range for a sample of 40 trees: 32.0 - 4.1 = 27.9 cm

continue