Question

A researcher wants to test the hypothesis that the mean rating of guilt will be higher for unattractive defendants than for attractive defendants. The appropriate statistical test would be the A. Pearson r. B. 1 tailed t-test. C. 2 tailed t-test. D. chi-square.

Answer 1

The appropriate statistical test for whether the mean rating of guilts are greater for unattractive defendants than for attractive is:

B. 1 tailed t-test.

What are the hypothesis test?

At the null hypothesis, it is tested if the mean rating of guilt will not be higher for unattractive defendants than for attractive defendants, that is:

$H_0: \mu_U \leq \mu_A$

At the alternative hypothesis, it is tested if the rating is greater, that is:

$H_1: \mu_U > \mu_A$

We are comparing the means, hence a t-test is used. We are testing if one is greater than other(not different), hence a 1-tailed test is used, and option B is correct.

More can be learned about hypothesis tests at brainly.com/question/13873630

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