1. Random Sampling Spider Web
Steve Harris
SPASH - Biology

2. 1 2 3 4 5 6 7 8 2 3 4 5 6 7 8 9 x x x

3. Sample Calculations: Your results will be different!!!
Step 1
Step 3
Cell 1: 480mm
Cell 2: 543mm
Cell 3: 234mm
Cell 4: 390mm
Cell 5: 425mm
Total: 2,072mm
1.) Ave. = Total / # of Sample Cells
2.) Ave. = 2,072mm / 5 Sample Cells
3.) Ave. = 414mm
1.) Meters of web = Average X # of Total Cells
2.) = 414mm X 56 Cells
3.) = mm
= cm
= dm
= Meters of web
Step 4
Step 2
Add the cells in Step 1

5. Name:___________ Hour: ___________ Date: ___________
Spider Web Sampling techniques
Calculations
Step 1
Step 3
Cell 1: ______ mm
Cell 2: ______ mm
Cell 3: ______ mm
Cell 4: ______ mm
Cell 5: ______ mm
Total: ______ mm
1.) Ave. = Total / # of Sample Cells
2.) Ave. = _________mm / 5 Sample Cells
3.) Ave. = _________mm
1.) Meters of web = Average X # of Total Cells
2.) = _________ mm X ____Cells
3.) = _________ mm
= _________ cm
= _________ dm
= ________ Meters of web
Step 4
Step 2
Add the cells in Step 1