Suppose we wish to calculate a 95% confidence interval for the average amount spent on books by freshmen in their first year at a major university. The interval is to have a margin of error of $3. Assume that the amount spent on books by freshmen has a Normal distribution with a population standard deviation o is $30. How many observations are required to achieve this margin of error? 19 20 384 385

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A: We want to calculate ϕ(41)

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A:

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A: Use trigonometric substitution x=2sint.

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A:

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A: Indefinite integration

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A:

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A:

Q: 2. Ф(24) Answer:

A: We want to find ϕ(24)

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A:

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A:

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A: Recall: BODMAS Rule : The BODMAS Rule states that we should calculate the brackets first ,then the…

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A:

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A: Topic = Vector

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A:

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A: We can find the integration as below

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A:

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A:

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A: We need to graph the given function y.