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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.
<h3>What are the hypothesis test?</h3>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:
At the alternative hypothesis, it is tested if the rating is greater, that is:
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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Note that the notation 
is just another way of writing 
. Here, we're simply taking the expression for f(x) and adding the expression for g(x) to it. Together, we have:
Which means that
And from there, it's just a matter of combining like terms to simplify.
Which means that
And from there, it's just a matter of combining like terms to simplify.