In a study, a researcher prepares a set of 30 women's photographs, with 15 mounted on a white background and 15 mounted on red. One picture is identified as the test photograph and appears twice in the set, once on white and once on red. Each male participant looks through the entire set of photographs and rates the attractiveness of each woman on a 10-point scale. Are the ratings for the test photograph significantly different when it is presented on a red background compared to a white background?

What statistical test will you use?

Correlation

z-test

One-way ANOVA

Independent samples t-test

Repeated measures t-test

Regression

One sample t-test

Then, answer why you picked the test you did?