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Learn/AI/Statistics

AI•Statistics

Descriptive Statistics

Descriptive Statistics is broken down into

Tendency and

Variability.

Tendency is about

Center Measures

The

Mean

(the average value)

The

Median

(the mid point value)

The

Mode

(the most common value)

The Mean

The

Mean Value is the

Average of all values.

This table contains 11 values:

10 11 14 14 15

To find the

Mean Value

: Add all values and divide by the number of values.

The

Mean Value is:

Formula

(7 + 8 + 8 + 9 + 9 + 9 + 10 + 11 + 14 + 14 + 15)/11 = 10.3636363636.

The

Mean is the

Sum divided by the

Count.

Calculate the Mean Value:

let mean = (7+8+8+9+9+9+10+11+14+14+15)/11;

Or use a math library like math.js

const values = [7,8,8,9,9,9,10,11,14,14,15];
let mean = math.mean(values);

The Median

A list of speed values:

99,86,87,88,111,86,103,87,94,78,77,85,86