Question

0 2.00 A study showed that a woman shown in a photograph was judged as less attractive when the photograph showed a visible tattoo compared to the same photograph with the tattoo removed (Resenhoelt. Vila & Wiseman 2008). Suppose a similar experiment is conducted as a repeated-measures study. A sample of n 12 males looks at a set of 30 photographs of women and rates the attractiveness of each woman using a 5-point scale (5 most positive. One photograph appears twice in the set once with a tattoo and once with the tattoo removed. For each participant, the researcher records the difference between the two ratings of the same photograph. On average the photograph without the tattoo is rated M -1.2 points higher than the photograph with the tattoo, with 55 +33 for the difference scores. Does the presence of a visible tattoo have a significant effect on the attractiveness ratings? Use a two-tailed test with = 05 In the space below, type the null and alternative hypotheses using the proper formatting and symbols . See SHAI

Answer 1

ANSWER: --- Given n-13, Mp=12 and ss = 33 Well hypothesis Ho: 40=0 i-e; presece of visible tattoo hoe no significance effect on atractiveness ratings Alternative hypothesis Hi: 870 ie; presence of a visible mbooo has Significance offection attracteness ratings critical nezion: den -12-) Two-toled tegls with Q=0.05 and df-11 CV tis -22 and 92 So, veject the sun hypothesis Ho if 42-8.4 or ++9.2 Test - Statistics. 19 Varance of Shores : : at SE of lo = 3mpet

T-ştatistics t: (llp-lin) SMO s 1-2-0 0.5 = 2:44 Hence Ho : : the ł Stabis 008 obtained in the coilical region i statistical decision is to reject Ho tamo has significant effect Hence presence of a visible on attractiveness ratings. ** - Thanking you - ***