Frequencies

Statistics > Basic Statistics > Frequencies

 

Makes tables and displays how many different values of a variable occur in the data.

The Frequencies procedure provides statistics and graphical displays that are useful for describing many types of variables. For a first look at your data, the Frequencies procedure is a good place to start.

 

Dialog box items

Variables:
Choose the columns you want to describe.
To select nonconsecutive columns, press and hold down CTRL, and then click each item.
You can select many columns. Use the Ctrl key to select (or unselect) distant columns.

Report:
The display of outputs of VisualStat.

 

Data

The data column can be numeric or non numeric. Use numeric codes or short strings to code categorical variables (nominal or ordinal level measurements).

 

Charts

Displays a bar chart or a line chart.

Chart Type:
Choose from the following options:

oNone: Choose to do nothing

oBar: Choose to display a bar chart for each variable.
A bar chart displays the count (or percentage) for each distinct value or category as a separate bar, allowing you to compare categories visually.

oLine: Choose to display a line chart for each variable

Chart Values:
Choose the type of axis label you want

oCount: Choose if bars (or lines) represent counts of unique values

oPercentage: Choose if bars (or lines) represent percentages

Options:
Choose the options you want.

oExclude missing values: Check to excludes rows that have missing values.

oShow ToolTip: Check to displays tooltip text when you point the chart.

oShow Data Labels: Check to label each data point with its y-axis value.

 

Example

Subjects were students in grades 4-6 from three school districts in Ingham and Clinton Counties, Michigan. Chase and Dummer stratified their sample, selecting students from urban, suburban, and rural school districts with approximately 1/3 of their sample coming from each district. Students indicated whether good grades, athletic ability, or popularity was most important to them. They also ranked four factors: grades, sports, looks, and money, in order of their importance for popularity. The questionnaire also asked for gender, grade level, and other demographic information.

Source: http://lib.stat.cmu.edu/DASL/Datafiles/PopularKids.html

1.Open the DataBook summary.vstz

2.Select the sheet PopularKids

3.Choose the tab Statistics, the group Basic Statistics and the command Frequencies

4.In Variables, select Gender, Race, Urban/Rural, and School

5.Click OK

 

Report window output

 

Frequencies

                                                           

                                            Valid  Cumulative

Gender                Frequency   Percent  Percent     Percent

girl                        251   52.5105  52.5105     52.5105

boy                         227   47.4895  47.4895    100.0000

<total>                     478  100.0000                    

                                                           

                                            Valid  Cumulative

Race                  Frequency   Percent  Percent     Percent

White                       442   92.4686  92.4686     92.4686

Other                        36    7.5314   7.5314    100.0000

<total>                     478  100.0000                  

                                                           

                                            Valid  Cumulative

Urban/Rural           Frequency   Percent  Percent     Percent

Urban                       178   37.2385  37.2385     37.2385

Suburban                    151   31.5900  31.5900     68.8285

Rural                       149   31.1715  31.1715    100.0000

<total>                     478  100.0000                  

                                                           

                                            Valid  Cumulative

School                Frequency   Percent  Percent     Percent

Sand                         28    5.8577   5.8577      5.8577

Brentwood Middle             84   17.5732  17.5732     23.4310

Westdale Middle              49   10.2510  10.2510     33.6820

Main                         68   14.2259  14.2259     47.9079

Elm                          21    4.3933   4.3933     52.3013

Portage                      61   12.7615  12.7615     65.0628

Brown Middle                 52   10.8787  10.8787     75.9414

Ridge                        48   10.0418  10.0418     85.9833

Brentwood Elementary         67   14.0167  14.0167    100.0000

<total>                     478  100.0000                  

 

 

Interpreting the results

From the output, you might learn that 37.2% of students are urban, 31.6% are suburban, and 31.2% are rural.

 

 

 

See Also:


Report | Numeric Formats