A medical laboratory tested 8 samples of human blood for acidity on the pH scale, with the results below. 7.5 7.3 7.5 7.5 7.4 7.5 7.2 7.5 a. Find the mean and standard deviation. b. What percentage of the data is within 1 standard deviation of the mean?
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The mean is the sum of the data points divided by the number of data points. Mean = $\frac{7.5 + 7.3 + 7.5 + 7.5 + 7.4 + 7.5 + 7.2 + 7.5}{8}$ Mean = $\frac{59.4}{8}$ Mean = $7.425$ Show more…
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