 DirectionsforfinalassignmentPowerPoint.docx

STATISTICAL PARAMETERS

A statistical parameter is a number that is obtained from the data of a statistical distribution.

The statistical parameters are used to synthesize the information given by a table or by a graph.

Types of statistical parameters

There are three types of statistical parameters:

1. centralization.

2. Position

3. Dispersion.

Centralization measures

They tell us around what value (center) the data is distributed.

The centralization measures are:

Arithmetic average

The average is the average value of the distribution.

Median

The median is the score of the scale that separates the upper half of the distribution and the lower half, that is, it divides the data series into two equal parts.

Mode

Mode is the most repeated value in a distribution.

Position measures

Position measurements divide a set of data into groups with the same number of individuals.

To calculate the position measurements, it is necessary that the data be ordered from least to greatest.

The position measurements are:

Quartiles

The quartiles divide the data series into four equal parts.

Deciles

The deciles divide the data series into ten equal parts.

Percentiles

The percentiles divide the data series into one hundred equal parts.

Measures of dispersion

Dispersion measures tell us how far the values ​​of the distribution move away from the center.

The dispersion measures are:

Range

The range is the difference between the largest and the least of the data of a statistical distribution.

Mean deviation

The average deviation is the arithmetic mean of the absolute values ​​of the deviations from the mean.

Variance

The variance is the arithmetic mean of the square of the deviations from the mean.

Typical deviation

The standard deviation is the square root of the variance.

Graphs

Also include the Following graphs in your power point presentation:

Distribution Table for the data

Bar Graph

Histogram

Circle Graph

Frequency Polynomial

• Introduction

• Types of variables

• Boards

• Bar chart

• Sectors diagrams

• Histogram

• Stat parameters

• Fashion

• Median

• Arithmetic average

• Quartiles

• Deciles

• Percentiles

• Average deviation

• Variance

• Typical deviation

• Variation coefficient

• Summary

• Index

Exercise