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Q: When we know the population mean but not the population standard deviation which statistic do we use to compare a sample to the population?

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Use %RSD when comparing the deviation for popolations with different means. Use SD to compare data with the same mean.

One the main advantage of using the coefficient of variation over the standard deviation to measure volatility is the fact that CV is normalized and can be used to directly compare different asset's volatility. The standard deviation must be used in the context of the mean of the data.

The first set would have most data points very close to 50 while in the second set they would be much further away.

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Use %RSD when comparing the deviation for popolations with different means. Use SD to compare data with the same mean.

One the main advantage of using the coefficient of variation over the standard deviation to measure volatility is the fact that CV is normalized and can be used to directly compare different asset's volatility. The standard deviation must be used in the context of the mean of the data.

One the main advantage of using the coefficient of variation over the standard deviation to measure volatility is the fact that CV is normalized and can be used to directly compare different asset's volatility. The standard deviation must be used in the context of the mean of the data.

The first set would have most data points very close to 50 while in the second set they would be much further away.

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