In this lesson, we are going to be talking about central tendency, mean, median, and mode. Mean, median, and mode are what most people think about when they think about statistics, especially descriptive statistics. We are going to be talking about these three measures of central tendency. Then we are going to spend a little bit more time on mean. We are going to review the summation symbol Sigma (Σ) and we are also going to talk about the different formulas for population mean versus sample mean. Then we are going to talk about some Excel examples and finally we are going to compare these measures of central tendency.
Lecture Slides are screen-captured images of important points in the lecture. Students can download and print out these lecture slide images to do practice problems as well as take notes while watching the lecture.
This book provides a clear and methodical approach to essential statistical procedures. It clearly explains the basic concepts and procedures of descriptive and inferential statistical analysis. This book features a new emphasis on expressions involving sums of squares and degrees of freedom as well as a stronger stress on the importance of variability.