The measure of variability indicating how many standard detions, an observation is above or below the mean is
A z-score is the number of standard detions from the mean. The coefficient of variation (CV) is a measure of relative variability. It is the ratio of the standard detion to the mean. Ref : Park 23rd edition Pgno : 849
Z score
Standard error (S.E)
Standard detion (S.D)
Co-efficient of Variation
Non communicable diseases