# Statistical Analysis Tools ••• John Foxx/Stockbyte/Getty Images

Statistics are mathematical computations used to analyze data. Tools of statistical analysis can describe, summarize and compare data. There are various tools that can analyze statistical data. These range from relatively simple computations to advanced analysis. Basic analyses can be easily computed, while more advanced methods require a solid understanding of advanced statistics as well as specialized computer software.

## Descriptive Analysis

Descriptive analysis uses specific tools to describe data. These are relatively simple calculations that give a basic picture of what the data looks like overall. Descriptive tools include: frequency, percentages and measures of central tendency. Frequency tells how many times something has occurred in a data set. Percentages are calculations that show a proportion. Measures of central tendency are represented by the mean, median and mode. These tools describe the central point (median), the most common (mode) or the average (mean) for a specific variable.

## Moderate Analysis

Moderate statistical analysis tools look at the relationships between variables -- what the nature of these relationships are and if they are significant. These include correlation and regression. A correlation describes the relationship between two variables as well as the direction and strength of that relationship. Regression can show if a variable predicts another variable. Like correlation, however, regression does not show causation.