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Thomas is interested in variables that may affect an individual's athletic ability. He has people play soccer on a course in wet, dry, or icy conditions. In addition, Thomas has them play soccer with or without a warm-up session, and with athletic shoes or casual shoes. In this design, there are________ possible main effects and________ possible interactions.
a. 2; 3 b. 2; 2 c. 3; 12 d. 3; 4
Sagot :
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