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 Statistical Techniques and 6 Sigma
 Help with Coefficient of Variation
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| Author | Topic: Help with Coefficient of Variation |
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bp0001 unregistered |
posted 02 August 2001 11:12 AM
 
I am trying to compare the mortality rate of a current population to the mortality rate of a prior population. I am evaluating the statistic X=(number of deaths in current population) / (prior mortality rate*current exposure) Is the coefficient of variation 1/sqrt(number of deaths of current population) This was given to me by someone, but I can't work out the logic. If it is, can you tell me why? IP: Logged |
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Rick Goodson Forum Wizard Posts: 135 |
posted 03 August 2001 06:04 PM
 
bp0001, I am not sure I understand your question. Never the less... The Coefficient of Variation is a relative measure of dispersion. It is the standard deviation divided by the mean multiplied by 100 to give a percentage value. This measure can not be used when the data takes both positive and negative values. It is usually associated with Log-Normal distributions where the values are all positive and are markedly skewed such as the survival times of bacteria when treated with a disinfectant. Hope this helps. Rick IP: Logged |
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