1. Equation: Mean Example data: DBH (in)CountSum 5630 61166 717119 820160 919171 1011110 SUM84656 Mean = 7.81

2. Mode

3. Median DBH (in) 10 9 8 11 12 50

4. Tree Count (# Trees) # Occurances 0186 1185 2102 323 44 10001 Mean = 0.948 Median = 1 If we have that 1000 Mean = 2.942 Median = 1

5. Range Largest Value – Smallest Value Gets the extreme values

6. Standard Deviation

8. Coefficient of Variation DBH (in) 8 10 12 15 9 13 MEAN: 11.17” SD: 2.64”

9. Homework Problem Find mean, mode, median, range, standard deviation, and coefficient of variation of the following tree height data (feet) 60, 75, 66, 83, 59, 91, 66, 78, 84, 100, 73, 66, 75