Statistics project

Introduction

A logical place to begin analysis of data is simply to describe the distribution of one variable at a time. (Such analysis is often referred to as univariate analysis.)

Central Tendency

The central tendency of a variable is nothing more than its average value. There are, however, different kinds of averages: the mean, the median, and the mode.

The Mean

Also known as the “arithmetic mean,” this is probably what most of us think of when we use the term "average." The mean value of a variable is calculated simply by adding up all the values and then dividing by the number of cases. The mean requires that data be at least interval level. Take, for example, a variable with three cases having the values 2, 3, and 4 respectively. The mean for this variable