Can people tell the difference between a female nose and a male nose? Eight Cauc
ID: 3225576 • Letter: C
Question
Can people tell the difference between a female nose and a male nose? Eight Caucasian males and eight Caucasian females posed for nose photos. The article states that none of the volunteers wore nose studs or had prominent 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 undergraduate 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 identifications differs for the three different nose views? Test the appropriate hypotheses using a .05 significance level. (Use 2 decimal places.)
17
2 =
P-value interval (select one)
p < 0.001
0.001 p < 0.01 0.01 p < 0.05
0.05 p < 0.10
p 0.10
The data ---Select--- support do not support the hypothesis that the proportions of correct sex identifications differ for the three different nose views.
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Explanation / Answer
The statistical software output for this problem is:
Contingency table results:
Rows: var6
Columns: None
Chi-Square test:
Hence,
X2 = 0.49
p > 0.10
Do not support
Front Profile Three-Quarter Total Correct 25 26 23 74 Incorrect 15 14 17 46 Total 40 40 40 120