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.
Best Answer: It is saying: if you take two sets or distributions and add them together, then is the standard deviation of the new set equal to the sum of the standard deviations of the two separate sets? The answer is no, because standard deviation is the square root of the differences of the values from the mean. And square roots are not additive.