SAS Certification Prep Guide

Chapter 2: Summarizing Your Data with Descriptive Statistics

Introduction. 13

Measures of Center 15

Mean. 15

Median. 22

Mode. 22

Measures of Variation. 24

Range. 24

Variance. 25

Standard Deviation. 35

Measures of Shape. 40

Skewness. 40

Kurtosis. 50

Other Descriptive Measures. 59

Percentiles, the Five-Number-Summary, and the Interquartile Range (IQR) 59

Outliers. 74

The MEANS Procedure. 74

Procedure Syntax for PROC MEANS.. 76

Customizing Output with the VAR statement and Statistics Keywords. 77

Comparing Groups Using the CLASS Statement or the BY Statement 79

Multiple Classes and Customizing Output Using the WAYS and TYPES Statements. 85

Saving Your Results Using the OUTPUT Statement 92

Handling Missing Data with the MISSING Option. 116

Key Terms ...