1, modal, linguistic noun, or plural, is one of morphemes, which is used to represent more than one object in languages with no even concept, and to represent the number of more than two nouns in languages with even concept.

2. Median, also known as median, is a proper term in statistics. It is a number in the middle of a set of data arranged in sequence, representing a numerical value in a sample, population or probability distribution, and can divide a numerical value set into equal upper and lower parts. 3. When probability theory and statistical variance measure random variables or a set of data, variance is a measure of deviation. Variance in probability theory is used to measure the deviation between random variables and their mathematical expectations (that is, the mean value).

Median feature

1, the median is the representative value of all unit flag values determined by its position among all flag values, and is not affected by the maximum or minimum value of the distribution sequence, thus improving the representativeness of the median to the distribution sequence to some extent.

2. For some single series of discrete variables, when the frequency distribution is skewed, the representativeness of the median will be affected.

3, tend to be in the middle of a set of ordered data.