? Skew distribution is a statistical concept, that is, the frequency distribution in which the peak value of statistical data is not equal to the average value. According to whether the peak value is less than or greater than the average value, it can be divided into positive bias function and negative bias function, and the degree of deviation can be described by skewness coefficient. I got 78 in probability theory in this university and 89 in high school. People in linear algebra 98)

In the afternoon, the teacher said:

Left skewness distribution (negative skewness): mean value (mean value)

Right skewness distribution (normal skewness): mode