(Solved) Problem 1: A report states that on average Moroccan boys (12-18 years old) get a haircut 5.8 times ...

Amanda387

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Problem 1: A report states that on average Moroccan boys (12-18 years old) get a haircut 5.8 times ...

Problem 1:
A report states that on average Moroccan boys (12-18 years old) get a haircut 5.8 times a year. An independent researcher randomly selected 20 boys (12-18 years old) and obtained these data.
3 2 1 3 7 2 9 4 6 6
8 0 5 6 4 2 1 3 4 1

At α = 0.05, can it be concluded that the average is still 5.8 visits per year? (Hint: use the t test for hypothesis testing)

Problem 2:
A large university reports that the mean salary of parents of an entering class is $91,600. To see how this compares to his university, a president surveys 28 randomly selected families and finds that their average income is $88,500. If the sample standard deviation is $10,000, can the president conclude that there is a difference? At α = 0.10, is he correct?
(Hint: hypothesis testing when the mean is known/ z table)

Because of these circumstances, I decided to give you a light final exam. Get back to me if you need any help

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bio_man

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bio_man

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3 years ago

Quote from: med12 (3 years ago)

Because of these circumstances, I decided to give you a light final exam. Get back to me if you need any help

What do you mean by that?

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bio_man

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3 years ago

Quote from: med12 (3 years ago)

Problem 2: A large university reports that the mean salary of parents of an entering class is $91,600. To see how this compares to his university, a president surveys 28 randomly selected families and finds that their average income is $88,500. If the sample standard deviation is $10,000, can the president conclude that there is a difference? At α = 0.10, is he correct? (Hint: hypothesis testing when the mean is known/ z table)

Check this out:

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Amanda387 Author

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3 years ago

thank youu

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bio_man

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3 years ago

Let me know what you get for problem 2. I can confirm that problem 1 is correct, I looked my solution over, it checks out.

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Amanda387 Author

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3 years ago

I still don't understand the solution of problem 1

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bio_man

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3 years ago

Quote from: med12 (3 years ago)

I still don't understand the solution of problem 1

Which part? Did you watch the video that came with it?

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Amanda387 Author

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3 years ago

yes i did but i found it difficult

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bio_man

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3 years ago

Watch it several times over, its been explained really well.

In terms of the solution I provided above, which part doesn't make sense to you?

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bio_man

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#10

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3 years ago

Answer to question 2:

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Amanda387 Author

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#11

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3 years ago

now i understand thank you

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mimifa21

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#12

3 years ago

thank you

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bio_man

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#13

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3 years ago

Quote from: mimifa21 (3 years ago)

thank you

Welcome, feel free to ask more questions...

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