The pH of water samples taken from Iligan Bay was determined. Calculate the pooled estimate of the standard deviation for the analysis, based from the following columns of data: Site No. of Samples measured pH Mean pH Sum of Squares of Deviation from the Mean 1 4 8.02, 8.09, 7.95, 7.98 8.01 0.0110 2 3 7.50, 7.65, 7.49 7.55 0.0161 3 3 8.25, 8.29, 8.20 8.25 0.0041
The pH of water samples taken from Iligan Bay was determined. Calculate the pooled estimate of the standard deviation for the analysis, based from the following columns of data: Site No. of Samples measured pH Mean pH Sum of Squares of Deviation from the Mean 1 4 8.02, 8.09, 7.95, 7.98 8.01 0.0110 2 3 7.50, 7.65, 7.49 7.55 0.0161 3 3 8.25, 8.29, 8.20 8.25 0.0041
Chapter7: Statistical Data Treatment And Evaluation
Section: Chapter Questions
Problem 7.10QAP
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The pH of water samples taken from Iligan Bay was determined. Calculate the pooled estimate of the standard deviation for the analysis, based from the following columns of data:
Site |
No. of Samples measured |
pH |
Mean pH |
Sum of Squares of Deviation from the Mean |
1 |
4 |
8.02, 8.09, 7.95, 7.98 |
8.01 |
0.0110 |
2 |
3 |
7.50, 7.65, 7.49 |
7.55 |
0.0161 |
3 |
3 |
8.25, 8.29, 8.20 |
8.25 |
0.0041 |
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