First, consider deliberate thinking. Deliberate thinking is relatively slow, rule-based and explicit; a contemplative process of weighing pros and cons, gathering scientific or statistical evidence. It would appear that this makes for pretty solid decision-making.
Jul 24, 2015. Outliers increase the standard deviation. Mean is most affected by outliers, since all values in a sample are given the same weight when calculating mean. A value that is far removed from the mean is going to likely skew your results and increase the standard deviation. Say you have five values: 2, 1, 2, 1.5, and 2.1.
If the outlier $\,25\,$ is changed to $\,250\,$, then the new mean would be $\,32.125\,$, which does not seem at all representative of a âtypicalâ number in this data set! the MEDIAN of a data set. The median, on the other hand, is quite insensitive to outliers.