Class Notes (1,100,000)

CA (620,000)

UOttawa (30,000)

CMN (2,000)

CMN 3102 (50)

Ivan Katchanovski (10)

Lecture 3

# CMN 3102 Lecture Notes - Lecture 3: Descriptive Statistics, Frequency Distribution, Construct Validity

by OC401597

School

University of OttawaDepartment

CommunicationCourse Code

CMN 3102Professor

Ivan KatchanovskiLecture

3This

**preview**shows page 1. to view the full**5 pages of the document.**Lecture 3

Descriptive Statistics and Measurement

Descriptive Statistics

•!Descriptive statistics

o!Describes data

o!Summarizes data

•!Frequency distribution

•!Measures of central tendency

o!Mode

o!Median

o!Mean

•!Measures of variability/dispersion

o!Range

o!Standard deviation

o!Variance

Frequency Distribution

•!Frequency distribution: percentage distribution of the variable of

interest

•!Tables or charts that summarize the distribution of a variable

o!Frequency tables

!!Can be used for all types of variables

!!Valid Percent

o!Examples

•!Frequency Table

o!

Frequency Graphs/Charts

•!Graphs/charts can be used to illustrate frequency distributions

###### You're Reading a Preview

Unlock to view full version

Only page 1 are available for preview. Some parts have been intentionally blurred.

o!bar charts

o!pie charts

o!line charts

o!histograms

•!Examples

Graphic Description of Variables

•!

Graphic Description of Variables

###### You're Reading a Preview

Unlock to view full version