Right-skewed distribution
A right-skewed distribution has its long tail stretching toward the high values, which typically pulls the mean above the median.
Skew is named for the tail, not for the peak, so a right-skewed graph piles up on the left and trails off to the right. The few large values out in that tail drag the mean upward while barely moving the median, so the mean typically lands above the median. For the values 1, 2, 2, 3, 22 the mean is while the median is 2. Treat that ordering as a strong tendency rather than a theorem, since it is possible to build a right-skewed data set whose mean is not above its median.
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