Verify that the test statistic is equal to 2.3

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Reference no: EM131187859

Feminizing faces study. Research published in Nature (August 27, 1998) revealed that people are more attracted to ‘‘feminized'' faces, regardless of gender. In one experiment, 50 human subjects viewed both a Japanese female and Caucasian male face on a computer. Using special computer graphics, each subject could morph the faces (by making them more feminine or more masculine) until they attained the ‘‘most attractive'' face. The level of feminization y (measured as a percentage) was measured.

(a) For the Japanese female face, y¯ = 10.2% and s = 31.3%. The researchers used this sample information to test the null hypothesis of a mean level of feminization equal to 0%. Verify that the test statistic is equal to 2.3.

(b) Refer to part a. The researchers reported the p-value of the test as p ≈ .02. Verify and interpret this result.

(c) For the Caucasian male face, y¯ = 15.0% and s = 25.1%. The researchers reported the test statistic (for the test of the null hypothesis stated in part a) as 4.23 with an associated p-value of approximately 0. Verify and inter- pret these results.

Reference no: EM131187859

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