The authors of the paper “Racial Stereotypes in Children’s Television Commercials” (Journal of Adver-tising Research : 80–93) counted the number of times that characters of different ethnicities appeared in commercials aired on Philadelphia television stations, re-sulting in the data in the accompanying table.
Based on the 2000 Census, the proportion of the U.S. population falling into each of these four ethnic groups are .177 for African-American, .032 for Asian, .734 for Cauca-sian, and .057 for Hispanic. Do the data provide sufficient evidence to conclude that the proportions appearing in commercials are not the same as the census proportions? Test the relevant hypotheses using a significance level of .01.
Can people tell the difference between a female nose and a male nose? This important (?) research question was examined in the article “You Can Tell by the Nose: Judging Sex from an Isolated Facial Feature” (Percep-tion : 969–973). Eight Caucasian males and eight Caucasian females posed for nose photos. The article states that none of the volunteers wore nose studs or had promi-nent nasal hair. Each person placed a black Lycra tube over his or her head in such a way that only the nose protruded through a hole in the material. Photos were then taken from three different angles: front view, three-quarter view, and profile. These photos were shown to a sample of un-dergraduate students. Each student in the sample was shown one of the nose photos and asked whether it was a photo of a male or a female; and the response was classified as either correct or incorrect. The accompanying table was constructed using summary values reported in the article. Is there evidence that the proportion of correct sex identi-fications differs for the three different nose views?
|Sex ID||Front||Profile||Three Quater|
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