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The following dissolved oxygen analysis results from an alternative method to winkler method is summarized below. Find the coefficient of variation. ppm O2: 23.2, 24.1, 23.7, 23.0, 24.5: a. 0.62, b. 2.62, 0.03, d. 4.37
Accepted Answer
The coefficient of variation (CV) is calculated as the standard deviation (SD) divided by the mean, expressed as a percentage. Here's how to find it:
1. Calculate the mean: (23.2 + 24.1 + 23.7 + 23.0 + 24.5) / 5 = 23.7 ppm O2
2. Calculate the standard deviation: This involves finding the difference of each value from the mean, squaring those differences, averaging those squared differences, and then taking the square root. A calculator or spreadsheet will help here.
3. Divide the standard deviation by the mean and multiply by 100%: This will give you the coefficient of variation.
Without the actual standard deviation calculated, we cannot determine the correct answer from the choices provided. You will need to calculate the standard deviation using the data provided.
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