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.
Answers. Relevance. Rating Newest Oldest. Best Answer: An outlier is defined as a number less than Q1-1.5(IQR) or a number greater than Q3+1.5(IQR) In your case, if you calculate the second equation, anything above 9.25 is an outlier. With 15 being a high outlier, it will increase the mean. If it was a low outlier then it would decrease the mean.