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Posts Tagged ‘Descriptive Analysis’

Chi-Squared Challenging using SPSS

  Chi-Squared Challenging using SPSS A Chi-Square Challenge (or Test) procedure organizes your data pond variables into groups and computes a chi-square statistic. Here is the specific definition: “The chi-square (chi, the Greek letter pronounced “kye”) statistic is a statistical technique used to determine if a “distribution of observed frequencies” differs from the “theoretical expected […]

IBM SPSS Split File

You can use the IBM SPSS Split File feature to split your data pond into separate groups for further analysis –based on the values of one or more grouping variables. If you select multiple grouping variables, cases are grouped by each variable within categories of the preceding variable on the Groups Based On list. For […]

IBM SPSS and Frequencies Command

The Frequencies command is one of the simplest yet one of the most useful descriptive techniques.  Its objective is to simply sum the number of instances within a particular category. For example, the following questions could be easily answered: How many males and females make up my data pond? What are the number of ethnic […]

Ranking your Cases: IBM SPSS Statistics

Ranking A ranking is a relationship between a set of items such that, for any two items, the first is either “ranked higher than”, “ranked lower than” or “ranked equal to” the second. – Wikipedia   Ranking in SPSS Statistics IBM SPSS Statistics ranks cases in your data pond by automatically defining new variables to […]

Multiple Data Sources and Predictive Modeling

Knowledge Bottleneck? When building a predictive model, the larger the number of examples or “cases” considered, the better the model. Typically, these cases exist in multiple data files (or data sources) that must be “stitched together”. The task of accessing each data source, performing some analysis on the cases contained in the data and formatting […]