Descriptive Statistics

 I.  Describing and summarizing data (descriptive statistics)

A. Introduction

• What are statistics (and why should we care)?  

• Descriptive vs. Inferential statistics

 

 

 

 

B. Pictorial representations  

• frequency distributions

• frequency histograms/bar graphs

• frequency polygons

C.  Central tendency

·      mean 

·      median 

·      mode

Discussion

D. Variance (review) and standard deviation

 

 

 

 

 

E. The normal curve and z scores

 

 

 

 

 

 

 

 

II. ACTIVITY - SURVEY DATA