Please use the following information to answer 9a-9c: There is some evidence indicating that people with visible tattoos are viewed more negatively than people without visible tattoos (Resenhoeft, Villa, & Wiseman, 2008). In a similar study, a researcher first obtained overall ratings of attractiveness for a woman with no tattoos shown in a color photograph. On a 7-point scale, the woman received an average rating of µ = 4.9, and the distribution of ratings was normal with a standard deviation of σ = 0.84. The researcher then modified the photo by adding a tattoo of a butterfly on the woman's left arm. The modified photo was then shown to a sample of n = 16 students at a local community college and the students used the same 7-point scale to rate the attractiveness of the woman. The average score for the photo with the tattoo was x̅ = 4.2. Does the data indicate a significant difference in rated attractiveness when the women appeared to have a tattoo? Use a two-tailed test with α = .05. 9a. Which of the following correctly represents the null and alternative hypothesis for the mentioned sample of n =16 (MUST SHOW WORK FOR THIS PROBLEM)? 9b. Which of the following represents the critical region for this mentioned sample (MUST SHOW WORK FOR THIS PROBLEM)? 9c. Compute the test statistic (z-observed) for the mentioned sample (MUST SHOW WORK FOR THIS PROBLEM). Note: Must show calculations for standard error alongside the calculations for the test statistic.
Please use the following information to answer 9a-9c:
There is some evidence indicating that people with visible tattoos are viewed more negatively than people without visible tattoos (Resenhoeft, Villa, & Wiseman, 2008). In a similar study, a researcher first obtained overall ratings of attractiveness for a woman with no tattoos shown in a color photograph. On a 7-point scale, the woman received an average rating of µ = 4.9, and the distribution of ratings was normal with a standard deviation of σ = 0.84. The researcher then modified the photo by adding a tattoo of a butterfly on the woman's left arm. The modified photo was then shown to a sample of n = 16 students at a local community college and the students used the same 7-point scale to rate the attractiveness of the woman. The average score for the photo with the tattoo was x̅ = 4.2.
Does the data indicate a significant difference in rated attractiveness when the women appeared to have a tattoo? Use a two-tailed test with α = .05.
9a. Which of the following correctly represents the null and alternative hypothesis for the mentioned sample of n =16 (MUST SHOW WORK FOR THIS PROBLEM)?
9c. Compute the test statistic (z-observed) for the mentioned sample (MUST SHOW WORK FOR THIS PROBLEM).
Note: Must show calculations for standard error alongside the calculations for the test statistic.
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