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:
![H_0: \mu_U \leq \mu_A](https://tex.z-dn.net/?f=H_0%3A%20%5Cmu_U%20%5Cleq%20%5Cmu_A)
At the alternative hypothesis, it is tested if the rating is greater, that is:
![H_1: \mu_U > \mu_A](https://tex.z-dn.net/?f=H_1%3A%20%5Cmu_U%20%3E%20%5Cmu_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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Answer:
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Step-by-step explanation:
2*18-18=18
2*[28-3*(2+4)] = 20
18<20
4 + 7x - 3x + 2 = 8x + 6
6 + 4x = 8x + 6
Subtract 6 and 4x from both sides
0 = 4x
0 = x
Answer:
5/9
Step-by-step explanation:
total present = males + females = 60 + 48 = 108
The desired ratio is ...
males/total present = 60/108 = 5/9