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notes515fall10chap10 - STAT 515 - Chapter 10: Analysis of...

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STAT 515 -- Chapter 10: Analysis of Variance Designed Experiment – A study in which the researcher controls the levels of one or more variables to determine their effect on the variable of interest (called the response variable or dependent variable ). Response variable : Main variable of interest (continuous) Factors : Other variables (typically discrete) which may have an effect on the response. • Quantitative factors are numerical. • Qualitative factors are categorical. The levels are the different values (for each factor) used in the experiment. Example 1: Response variable: College GPA Factors: Gender (levels: Male, Female) # of AP courses (levels: 0, 1, 2, 3, 4+) The treatments of an experiment are the different factor level combinations. Treatments for Example 1:
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Experimental Units : the objects on which the factors and response are observed or measured. Example 1? Designed experiment : The analyst controls which treatments to use and assigns experimental units to each treatment. Observational study : The analyst simply observes treatments and responses for a sample of units. Example 2:
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This note was uploaded on 12/14/2011 for the course STAT 515 taught by Professor Zhao during the Spring '10 term at South Carolina.

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notes515fall10chap10 - STAT 515 - Chapter 10: Analysis of...

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