When calculating the coefficient of variation, which of the following formulas is used?

Prepare for the AAB Medical Technologist Test with engaging flashcards and multiple choice questions. Each question includes explanations to enhance your understanding. Ace your exam on the first attempt!

The coefficient of variation is a statistical measure of the relative variability of data, expressed as a percentage. It is calculated by taking the ratio of the standard deviation to the mean, which provides insight into how much variation exists in relation to the average value of the dataset.

Using the formula where the standard deviation is divided by the mean allows for comparison of variability across different datasets, even if they have different units or scales. This ratio highlights the degree of dispersion relative to the mean, making it a valuable tool in fields such as laboratory medicine, where understanding variability in test results is crucial for quality control and interpretation of patient data.

The other options do not provide a valid representation of the coefficient of variation. For instance, dividing the mean by the standard deviation or subtracting one from the other does not yield any meaningful insight into the data's relative variability. Additionally, adding the standard deviation to the mean is not relevant to the coefficient of variation as it neither describes the relationship between variability and average value nor maintains the proper statistical interpretation required for this measure.

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