Sex sells, part II. In Exercise 3 you considered the question of whether sexual images in ads affected people s abilities to remember the item being advertised. To investigate, a group of Statistics students cut ads out of magazines. They were careful to find two ads for each of 10 similar items, one with a sexual image and one without. They arranged the ads in random order and had 39 subjects look at them for one minute. Then they asked the subjects to list as many of the products as they could remember. Their data are shown in the table. Is there evidence that the sexual images mattered?
Exercise 3:
Sex sells? Ads for many products use sexual images to try to attract attention to the product. But do these ads bring people s attention to the item that was being advertised? We want to design an experiment to see if the presence of sexual images in an advertisement affects people's ability to remember the product.
a) Describe an experimental design that would require a matched-pairs t procedure to analyze the results.
b) Describe an experimental design that would require an independent sample procedure to analyze the results.