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Hello everyone.
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So in this question, we have given that the financial administrator claiming or believes that the average cost is higher than $8 ,900.
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And the average cost of tuition plus room and board for a small private liberal art college is equal to $8 ,900.
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Now, average cost per term of 350 small liberal art colleges is equal to, $9 ,185 and we have given the population standard deviation, which is $1 ,200 and significance level is 0 .05.
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Now we need to find the b value for this test.
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So the population average, that is population mean is this much.
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So mu is equal to $8 ,900.
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Sample mean, that is x bar, is equal to 9 ,185 and sample size.
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Is equal to 350.
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Now population standard deviation is equal to $1 ,200 and significance level, that is alpha is equal to 0 .05.
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Now we will write both the hypothesis and we know that claim is alternative hypothesis.
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So according to our claim, mu is greater than $8 ,900 and null hypothesis will be opposite of alternative hypothesis, that is, mu, should be less than equal to $8 ,900...