A market researcher showed a plain print ad of a new brand of designer jeans to several groups of college students and asked the students to rate the quality of the jeans.Then the researcher showed some other college students a print ad featuring movie star Scarlett Johansson wearing the new brand and again asked the students to rate the quality of the jeans.The marketer predicted that after viewing the ad featuring Johansson,the students' ratings of the jeans would be more positive than the other ones.In this experiment,students' ratings of the new blue jeans served as the

Question

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An experiment involves obtaining data by manipulating factors under tightly controlled conditions to test cause and effect.The interest is in whether changing one of the independent variables (a cause)will change the behavior of the dependent variable that is studied (the result).The researcher compared ratings of the quality of the jeans before and after the advertisement.The type of advertisement in the study served as the independent variable and the ratings of the jeans served as the dependent variable.

A Market Researcher Showed a Plain Print Ad of a New