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This chart describe the distribution of probability of number of males in a group of ten person. It is the binomial distribution that describe the characteristic of a variable, that it can take only two values.
The high of each bar is less than 11 and the add of all bars is = 1.
When the more high probability is near to the middle of range, the distribution is symmetrical. When the higher probability is near to the tails the distribution is skewed. It is skewed to the right if the higher probability is near 0 and it is skewed to the left when the higher probability is near 10 (in this example).