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# Would an anomaly in a set of data affect measures of spread or measures of location watch

1. measures of spread: e.g. standard deviation or IQR

measures of location: e.g. mean or median

like which is most affected??
2. (Original post by Mark jam)
measures of spread: e.g. standard deviation or IQR

measures of location: e.g. mean or median

like which is most affected??
Both, but I think it's more important to look at how each one is individually affected.
The mean is affected because each value is given the same weighting. The median isn't affected. The standard deviation isn't affected as much as the mean. This depends on the number of data in the set and the number of outliers. The greater the number of data and the fewer the number of outliers, the lesser the impact of the outlier.
3. (Original post by NotNotBatman)
Both, but I think it's more important to look at how each one is individually affected.
The mean is affected because each value is given the same weighting. The median isn't affected. The standard deviation isn't affected as much as the mean. This depends on the number of data in the set and the number of outliers. The greater the number of data and the fewer the number of outliers, the lesser the impact of the outlier.
Thanks!

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