The median for a data set with 10 members is the average of the fifth and sixth values thus, the median is (141 + 143)/2, or 142 mmol/L. Median: To find the median we arrange the 10 measurements from the smallest concentration to the largest concentration thus Dividing the sum by 10, gives the mean as 140.5, or \(1.40 \times 10^2\) mmol/L. The sum of the 10 concentrations is 1405.
Mean: To find the mean we add together the individual measurements and divide by the number of measurements. Data: A Collection of Problems for the Student and Research Worker, Springer-Verlag:New York, 1985, pp. This data is a portion of a larger data set from Andrew, D. Report the mean, the median, the range, the standard deviation, and the variance for this data. The following data were collected as part of a quality control study for the analysis of sodium in serum results are concentrations of Na + in mmol/L. It is much easier to determine the standard deviation using a scientific calculator with built in statistical functions.
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