labCE

Question 1

Calculate the coefficient of variation (percent) for a set of data where the mean = 89 mg/dl and two standard deviations = 14 mg/dl.

Answer 1

7. 9
   * Coefficient of variation (CV) = standard deviation ÷ mean x 100 (to convert to percentage)

2SD = 14

1SD = 7

7(SD) / 89 (mean) = 0.0786 x 100 = 7.9%

Question 2

what is the internal quality control?

Answer 2

testing commercial materials in-house to quickly verify test validity