In the article Violence and Sex Impair Memory for Television Ads (Journal of Applied Psychology, Vol. 87,

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In the article "Violence and Sex Impair Memory for Television Ads" (Journal of Applied Psychology, Vol. 87, No. 3, pp. 557-564), B. Bushman and A. Bonacci studied whether the type of television program in which commercials are placed affects a viewer's ability to remember the product. Participants watched a violent, sexually explicit, or neutral TV program that contained nine advertisements. The next day, participants were asked to recall the advertised brands. The number of brands the participants were able to recall are presented in the following table.

In the article

At the 5% significance level, do the data provide sufficient evidence to conclude that a difference exists in the median number of advertised brands a viewer is able to recall among the three TV program types?
Perform a Kruskal-Wallis test by using either the critical-value approach or the P-value approach

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