Powell's Pharmacy Ltd operates a regional chain of 120 pharmacies. Each pharmacy's floor plan include s...

 

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Powell's Pharmacy Ltd operates a regional chain of 120 pharmacies. Each pharmacy's floor plan include s a greeting card section which is relatively isolated. Sandra Ronaki, Marketing Manager, feels that the I evel of lighting in the greeting card section may affect sales in this area. She chooses three levels of ligh ting (soft, medium and bright) and randomly assigns six pharmacies to each lighting level. In Sandra's ex periment, 'lighting' is () A. a treatment variable B. the dependent variable C. a concomitant variable b D. a blocking variable Powell's Pharmacy Ltd operates a regional chain of 120 pharmacies. Each pharmacy's floor plan include s a greeting card section which is relatively isolated. Sandra Ronaki, Marketing Manager, feels that the I evel of lighting in the greeting card section may affect sales in this area. She chooses three levels of ligh ting (soft, medium and bright) and randomly assigns six pharmacies to each lighting level. In Sandra's ex periment, 'lighting' is () A. a treatment variable B. the dependent variable C. a concomitant variable b D. a blocking variable