Question

The following results were obtained from a set of automated white blood cell counts performed on 40 samples:

standard deviation: 153.2/uL
mean value: 12.450/uL
The coefficient of variation,
a 0.01%
b 1.2%
c 2.5%
d 8.1%

Answer 1

The coefficient of variation is approximately 1.23%. The correct answer is b) 1.2%.

Step-by-step explanation:

The coefficient of variation is a measure of relative variability and is calculated as the standard deviation divided by the mean, expressed as a percentage. In this case, the standard deviation of the white blood cell counts is 153.2/uL and the mean value is 12.450/uL. To find the coefficient of variation, we divide the standard deviation by the mean and multiply by 100:

Coefficient of Variation = (Standard Deviation / Mean) * 100

Calculating this for the given values:

Coefficient of Variation = (153.2 / 12.450) * 100 ≈ 1.23%

Therefore, the coefficient of variation is approximately 1.23%. The correct answer is b) 1.2%.