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# Questions tagged [coefficient-of-variation]

A measure of dispersion expressed relative to the mean, used for positive variables. Equals the standard deviation divided by the mean.

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### dependency of the deviation to the measurement level: how to test normality?

A machine measures the height of some plants. In the context of industrial quality procedures, we repeat the same measurement Hi 10 times and expect the ...
13 views

### How to compare two distribution where each point is not from a independent sample

columns are samples and rows are genes. There are two groups. I calculated coefficient of variance (CV) for each group so for each gene there are two CV one for group A and one for group B. I ...
13 views

### Is there a statistic or metric that measures variation (or deviation from mean) in a time-dependent manner?

I am evaluating two time series. One has a larger Coefficient of Variation (CV) than the other. But I have also noticed that one of the time series has longer consecutive deviations from the mean. ...
495 views

### Is a gamma distribution adapted when the coefficient of variation is roughly the same across observations?

Each observation is a distribution of values. Computing the mean $\mu_i$ and standard deviation $\sigma_i$ for each observation $i$ showed that the coefficient of variation (CV) is roughly constant ...
636 views

### Alternative for coefficient of variation due to negative observations

I have several measurements of trees over time (different vegetation indexes). Each measurement is in a different scale, some also include negative values (e.g. NDVI). I need to compare the ...
I am trying to use coefficients of variations ($CV$) to calculate sample size necessary to detect a difference of means ($\mu_0$ vs. $\mu_1$) for a variable that takes on values $x_i \in [0,1]$. I ...