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.
This is the only measure that is listed that is drastically affected by the outliers! If we took a similar set, {4, 5, 5, 5, 7}, with a closer grouping of values, the mean, median, and mode remain the same. The range changes to 7-4 = 3, however.