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Chapter 2 Organizing the Data. Nominal Data and Distributions. Frequency distribution of nominal data consists of two columns: Left column has characteristics (e.g., Response of Child) Right column has frequency ( f ). Comparing Distributions. Comparisons clarify and add information.

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nominal data and distributions
Nominal Data and Distributions
  • Frequency distribution of nominal data consists of two columns:
    • Left column has characteristics (e.g., Response of Child)
    • Right column has frequency (f)
comparing distributions
Comparing Distributions
  • Comparisons clarify and add information
rate of change
Rate of Change
  • Compare the same population at two points in time
  • Rate of Change =

time 2f – time1f

time 1f

(100)*

1Source: National Crime Victimization Survey

slide15
Cross Tabulations – Victim-Offender Relationship by Gender of Victim for Homicides in US for 2005 (With Row%)
slide16
Cross Tabulations – Victim-Offender Relationship by Gender of Victim for Homicides in US for 2005 (With Row%)
slide17
Cross Tabulations – Victim-Offender Relationship by Gender of Victim for Homicides in US for 2005 (With Row%)
slide18
Cross Tabulations – Victim-Offender Relationship by Gender of Victim for Homicides in US for 2005 (With Row%)
slide22

Histogram of Distribution of Children

in Little Rock Community Survey

slide24

Number of Adolescents (< 18 y/o)

Using for the First Time by Month

kurtosis
Kurtosis

Leptokurtic

Platykurtic

Mesokurtic

Some Variation in Kurtosis among Symmetrical Distributions

skewness
Skewness

Negatively skewed

Positively skewed

Symmetrical

(Normal)

Three Distributions Representing Direction of Skewness

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