Statistical Analysis

The levels of significant difference calculated for all tables is a 5% significance. It was determined by multiplying the calculated mean by a t value that was assigned by the degrees of freedom from a table in a statistics book.

Water Temperature in degrees Celcius

Site 1

Site 2

Site 3

Site 4

Totals

X

X squ.

X

X squ.

X

X squ

X

X squ.

Field Readings

18

324

18

324

18

324

20.5

420.25

24

576

21.5

462.25

17.5

306.25

15.5

240.25

Sum X

42

39.5

35.5

36

Sum X squared

900

786.25

630.25

660.5

Mean

21

19.75

17.75

18

(Sum X) squared/n

882

780.1

630.125

649

Sum x squared

18

6.1

0.125

12.5

36.7

n (number of readings)

2

2

2

2

degrees of freedom

1

1

1

1

4

Pooled s squared

9.2

Standard Deviation

3.03

Level of Significant Difference (5%)

8.41

There is no significant differences between temperatures at the four sites. 

Statistical Analysis of pH and concentrations of Carbon Dioxide, or Oxygen

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Statistical Analysis

pH

Site 1

Site 2

Site 3

Site 4

Totals

X

X squ.

X

X squ.

X

X squ

X

X squ.

Field Readings

10

100

9

81

7.7

56.25

9.5

90.25

10

100

9.8

96.04

7.5

56.25

9.5

90.25

10

100

8

64

7

49

9

81

10

100

9

81

8

64

9

81

Sum X

40

35.8

30

37

Sum X squared

400

322.04

225.5

342.5

Mean

10

8.95

7.5

9.25

(Sum X) squared/n

400

320.41

222

342.25

Sum x squared

0

1.63

0.5

0.25

2.38

n (number of readings)

4

4

4

4

degrees of freedom

3

3

3

3

12

Pooled s squared

0.198

Standard Deviation

0.315

Level of Significant Difference (5%)

0.686

Site 1 is significantly different from all others as is site 3. Only sites 2 and 4 have similar pH.

Statistical Analysis of Water Temperature and concentrations of Carbon Dioxide, or Oxygen

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