What Is the Median Eminence?

Median is also called median. It is a proper noun in statistics. It is a number in the middle of a group of data arranged in order. It represents a value in a sample, population, or probability distribution. The set of values is divided into two equal parts. For a limited number of sets, you can find the middle one as the median by sorting all observations high and low. If there are an even number of observations, the average of the two middle values is usually used as the median.

Median, also called midpoint, median. The median is the number in the middle of a group of data arranged in order, that is, in this set of data, half of the data is larger than him, and half of the data is smaller than him. Here we use

To represent the median. (Note: The median is different from the mode. The mode refers to the largest number. Sometimes there is more than one mode, and the median can only have one.)

There is a set of data:

Sort it in ascending order as:

When N is an odd number,

; When N is even,

.

At most half of the values in a number set are less than the median, and at most half of the values are greater than the median. If the number of values greater than and less than the median are less than half, then there must be several values in the data set that are equivalent to the median.

Set continuous

1) The median is the representative value of the overall unit flag value determined by its position among all flag values, and is not affected by the maximum or minimum value of the distribution sequence, thereby increasing the median to a certain extent Representation of a distribution series.

2) Mononomial sequence of some discrete variables, when the degree distribution

For a group

In Matlab, the median () function is a built-in function that finds the median of a set of data. The rules are as follows: ^[1]

1) The average is calculated, so it will change with each data change.

2) The median is obtained by sorting, it is not affected by the extreme values of the maximum and minimum. The change of some data has no effect on the median. When individual data in a group of data changes greatly, it is often used to describe the concentration trend of this group of data.

3) Mode is also a representative number of data, reflecting the concentration of a set of data. In daily life, "best", "most popular", "most satisfied", etc. are all related to mode, which reflects a most general tendency.

Advantages and disadvantages:

Average: Requires all data in the entire group to be calculated; susceptible to extreme values in the data. Median: Just need to arrange the data in order to determine; not susceptible to extreme values in the data. Mode: Counted; not susceptible to extreme values in the data.