﻿ VisualStat® Examples - Frequencies

Software to Simplify Statistical Practice ...

## Descriptives

#### Data

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.

You want to compare the age of boys and girls, according to levels of school districts.

#### Analysis

1. Open the DataBook summary.vstz
open this data file via the Help / Open Examples menu; it is in the Sample Data
2. Select the sheet PopularKids
3. Choose the tab Statistics, the group Basic Statistics and the command Descriptives
4. In Variables, select Age
5. In Grouping Variables (optional), select Gender, School
6. Click Statistics page and check Minimum, Maximum
7. Click OK

#### Report Window Output

```Descriptives

Analysis Variable : Age
Gender                School    N     Mean  Minimum  Maximum  Std Dev
boy  Brentwood Elementary   42  10.2143   9.0000  11.0000   0.6820
Brentwood Middle   47  11.5106  11.0000  13.0000   0.5466
Brown Middle   26  11.5000  11.0000  13.0000   0.6481
Elm    5   9.6000   9.0000  11.0000   0.8944
Main   31   9.8387   9.0000  11.0000   0.7788
Portage   26   9.6923   9.0000  11.0000   0.7884
Ridge   23   9.8261   9.0000  11.0000   0.7168
Sand   12  10.1667   9.0000  12.0000   0.7177
Westdale Middle   15  11.2000  11.0000  12.0000   0.4140
<total>  227  10.5286   9.0000  13.0000   1.0100
girl  Brentwood Elementary   25  10.0400   7.0000  12.0000   1.0985
Brentwood Middle   37  11.2162  11.0000  13.0000   0.4793
Brown Middle   26  11.2692  11.0000  12.0000   0.4523
Elm   16   9.8750   9.0000  11.0000   0.8062
Main   37   9.7297   9.0000  11.0000   0.6078
Portage   35   9.8000   9.0000  11.0000   0.7195
Ridge   25   9.6800   9.0000  11.0000   0.7483
Sand   16   9.6250   9.0000  11.0000   0.6191
Westdale Middle   34  11.0588  11.0000  12.0000   0.2388
<total>  251  10.3267   7.0000  13.0000   0.9407
<total>  Brentwood Elementary   67  10.1493   7.0000  12.0000   0.8573
Brentwood Middle   84  11.3810  11.0000  13.0000   0.5356
Brown Middle   52  11.3846  11.0000  13.0000   0.5655
Elm   21   9.8095   9.0000  11.0000   0.8136
Main   68   9.7794   9.0000  11.0000   0.6878
Portage   61   9.7541   9.0000  11.0000   0.7451
Ridge   48   9.7500   9.0000  11.0000   0.7293
Sand   28   9.8571   9.0000  12.0000   0.7052
Westdale Middle   49  11.1020  11.0000  12.0000   0.3058
<total>  478  10.4226   7.0000  13.0000   0.9784```