Introduction Power analysis is the name given to the process for determining the sample size for a research study. The technical definition of power is that it is the probability…
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  Types of weights There are several types of weights that you might find or create in a data set. probability weights – Perhaps the most common type of weights are…
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The following table shows general guidelines for choosing a statistical analysis. We emphasize that these are general guidelines and should not be construed as hard and fast rules. Usually your…
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  How do I convert among SAS, Stata and SPSS files?   On this page, conversions of different data formats are discussed.  In general, the strategies should work with SAS…
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How do I use a SAS data file in Stata?   1. Using SAS software SAS’s proc export can be used to convert a SAS data file to Stata format as shown below.  By…
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1. Using Stata 16 or higher Stata 16 will read SPSS data files. import spss using “D:\data\hsbdemo.sav”, case(lower)   2. Using -usespss- The user-written Stata ado-file usespss can be used…
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How do I use a Stata data file in SAS?   1. Reading a Stata data file with SAS SAS reads Stata data files with proc import. The following example…
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  How do I use a Stata data file in SPSS?     1. Using SPSS SPSS can read Stata data files. A Stata data file can be read in SPSS…
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For a 2-level hierarchical model, HLM requires two files for a 2-level model, one for level-1 and one for level-2. Similarly, for a 3-level hierarchical model, HLM requires three data…
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Note: The following is for HLM 5.04. HLM does not generally use the raw data directly. It creates a sufficient statistics matrix stored in an SSM file for a univariate…
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