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What do the statistical terms mean?

Average - Average sensor glucose reading.
Minimum – the lowest sensor glucose reading.
Quartile 25 – This is the sensor glucose reading whereby 25% of all readings fell at or below this value, after ranking all values from lowest to highest.
Median - The midpoint of all the sensor glucose readings, where half the readings fall below this value and half the readings fall above.
Quartile 75 – This is the sensor glucose reading whereby 75% of all readings fell at or below this value, after ranking all values from lowest to highest.
Maximum – the highest glucose reading.
Standard Deviation (SD) - A measure of variability in sensor glucose readings around the Average. The larger the Standard Deviation, the larger the variability.
Estimated Standard Deviation (Est. SD) - A separate (SD) statistic that first removes the top 25% and bottom 25% of sensor glucose readings (considered “outliers”) before calculating the standard deviation.
Inter Quartile Range (IQR) - The difference between the Quartile 75 reading and the Quartile 25 reading (Quartile 75 – Quartile 25).
Standard Error of the Mean (SE Mean) - Another estimate of variability that is calculated by dividing the SD by the square root of the # of values.
Percentage Coefficient of Variation (% CV) - Another estimate of variability that is calculated by dividing the SD by the Average.

LBL-011822 Rev01

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