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Histograms of three types of distributions: A normal distribution with a mean of 0 and a S.D. of 2 (A); The same normal distribution with 10% of the data replaced by data sampled from a normal distribution with a mean of 0 and a S.D. of 10, resulting in a heavy-tailed distribution (B); The original normal distribution with 10% of the data replaced with a log normal distribution, resulting in a skewed distribution (C).
