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Detergent manufacturers frequently makeclaims about the effectiveness of their products. Aconsumer-protection service decided to test the five best selling brands of detergent where

Detergent manufacturers frequently makeclaims about the effectiveness of their products. Aconsumer-protection service decided to test thefive best selling brands of detergent, where eachmanufacturer claims that its product produces the“whitest whites” in all water temperatures. Theexperiment was conducted in the following way.One hundred fifty white sheets were equally soiled.Thirty sheets were washed in each brand—l0 withcold water,10 with warm water, and 10 with hotwater. After washing, the “whiteness” scores foreach sheet were measured with laser equipment.Column 1: Water temperature codeColumn 2: Scores for detergent 1 (first10rows=coldwater, middle10rows=warm, andlast10rows=hot)Column 2: Scores for detergent 2 (same formatas column 2)Column 3: Scores for detergent 3 (same formatas column 2)Column 4: Scores for detergent 4 (same formatas column 2)Column 5: Scores for detergent5 (same formatas column 2)a. What are the factors in this experiment?b. What is the response variable?c. Identify the levels of each factor.d. Perform a statistic analysis using a5% signifi-cance level to determine whether there is suf-ficient statistical evidence to infer that thereare differences in whiteness scores between thefive detergents, differences in whiteness scoresbetween the three water temperatures, or inter-action between detergents and temperatures

Jun 22 2020 View more View Less

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