General Laboratory Calculations Laboratory Operations Review 65
CALCULATION EXAMPLE
F = 1.8°C + 32
Mean = Sx / n
Standard Deviation (SD) =
Coefficient of variation (%) = SD × 100
Mean
∑( x x)
n12
^
If the temperature of a refrigerator is 4°C, what is the temperature in °F?
°F = (1.8 × °C) + 32 = 39.2If the room temperature is 73°F, what is the temperature in °C?73 = 1.8°C + 32°C =^73 ^32 = 22.8
1.8S= sum, x = individual values, n = number of valuesS= sum, x = individual value, x–= mean, n = number of valuesWhat is the CV for a procedure whose mean is 100 and whose standard
deviation is 3?CV =^3 × 100 = 3%
100
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