Lecture 12S - Statistics 371-001 Sp 09 Lecture#12 3 Mar 09...

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Statistics 371-001, Sp 09 Lecture #12 3 Mar 09 Chapter 7. Comparison of Two Independent Samples Most research studies compare the results of two or more sets of data. Placebo vs. Treatment - on a measure of disease progression. Diet A vs Diet B – on growth or production. Females vs Males – on political attitudes. Control vs Treated. Evaluate the mean difference between the two samples: Important Points: 1. Naturally occurring vs conceptual populations. Females vs Males – on political attitudes. Placebo vs. Treatment - on a measure of disease progression.
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QuickTime™ and a TIFF (Uncompressed) decompressor are needed to see this picture. QuickTime™ and a TIFF (Uncompressed) decompressor are needed to see this picture. 2. Estimating difference in the populations. Idealized distributions for independent control and treated group samples. Total level of immune complexes (A) and percentage of elevation (B) in controls and Lecture 12 page 2
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QuickTime™ and a TIFF (Uncompressed) decompressor
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Lecture 12S - Statistics 371-001 Sp 09 Lecture#12 3 Mar 09...

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