Concentrations of Carbon Dioxide in ppm 

Site 1 
Site 2 
Site 3 
Site 4 
Totals 

X 
X squ. 
X 
X squ. 
X 
X squ 
X 
X squ. 

Field Readings 
0 
0 
0 
0 
2 
4 
0 
0 

0 
0 
0 
0 
3 
9 
0 
0 

0 
0 
0 
0 
3.5 
12.25 
0 
0 

0 
0 
0 
0 
2.5 
6.25 
0 
0 

Sum X 
0 
0 
11 
0 

Sum X squared 
0 
0 
31.5 
0 

Mean 
0 
0 
1.25 
0 

(Sum X) squared/n 
0 
0 
30.25 
0 

Sum x squared 
0 
0 
1.25 
0 
1.25 

n (number of readings) 
4 
4 
4 
4 

degrees of freedom 
3 
3 
3 
3 
12 

Pooled s squared 
0.104 

Standard Deviation 
0.228 

Level of Significant Difference (5%) 
0.497 
Statistical Analysis of Water Temperature, pH, Oxygen Concentration