## Statistics

## Review

### What is Statistics?

Statistics is a collection of mathematical techniques that help to analyze and present data.

### What is Range?

Range = The maximum value - The minimum value

### Comparing Statndard Deviation of two sets of data values

similar frequency usually means high standard deviation

### What are the Measures of Central Tendency?

Mean (aka average) = sum of data values x frequency

Sum of all data values = mean × frequency

Median = value in the middle

Mode = the most common data value