# Statistics

This category includes articles about statistics. Statistical methods are important to know about in order to be able to analyze financial markets and financial instruments.

The central value for a class is the value that represents the average for the class. ...

The class interval is the width of a class, the class interval is the difference between the maximum limit for the class and the lowest limit for the class. ...

Classes are groups of data and data is grouped into classes to organize and describe the data. Once a survey has been undertaken, you have raw data that need to be organized into classes to be meaning ...

Coefficient of variation is a measure of relative dispersion. The coefficient of variation gives a value for the dispersion in percent. ...

Continuous random variables are variables that can assume any value within a range. Examples of continuous random variables are the length of a person, the weight of a train, the diameter of a nail ha ...

Descriptive statistics are methods of organizing, summarizing and presenting data in a way that the data is easy to understand. ...

Discrete random variables are variables that can assume only certain clearly separated values such as integers. ...

An estimate in statistics is a value that is calculated directly from a sample. An estimate is just an estimate of a parameter, an estimate can never be said to be the fair value of a population. ...

The frequency distribution is a method to organize data within the field of descriptive statistics. A frequency distribution is a grouping of data into mutually exclusive classes with the number of ob ...

The geometric mean is a special form of central value that is useful when we have to calculate the average of the percentages, ratios, indices and growth rates. ...