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how to calculate mean median and mode in data mining. Take a dataset of a thousand ones and 1 time 1 million an obvious outlier. If you calculate the mean from this you get 1000.
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Mean Median and Mode of a Data Set. If the data does exhibit some skewness though eg there are a small number of very large values then the median might be a better choice. In this case analysts tend to use the mean because it includes all of the data in the calculations.
Wrt median mean.
This works by calculating the meanmedian of the non-missing values in a column and then replacing the missing values within each column separately and independently from the others. If the data does exhibit some skewness though eg there are a small number of very large values then the median might be a better choice. Having all three will give you a more complete picture. Take a dataset of a thousand ones and 1 time 1 million an obvious outlier.
