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Title: Problem 1: A report states that on average Moroccan boys (12-18 years old) get a haircut 5.8 times ... Post by: Amanda387 on May 19, 2020 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 Title: Problem 1: A report states that on average Moroccan boys (12-18 years old) get a haircut 5.8 times ... Post by: bio_man on May 19, 2020 Content hidden
Title: Re: Problem 1: A report states that on average Moroccan boys (12-18 years old) get a haircut 5.8 ... Post by: bio_man on May 19, 2020 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? Title: Re: Problem 1: A report states that on average Moroccan boys (12-18 years old) get a haircut 5.8 ... Post by: bio_man on May 19, 2020 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: https://www.youtube.com/watch?v=-pY57v0wiTI Title: Re: Problem 1: A report states that on average Moroccan boys (12-18 years old) get a haircut 5.8 ... Post by: Amanda387 on May 19, 2020 thank youu
Title: Re: Problem 1: A report states that on average Moroccan boys (12-18 years old) get a haircut 5.8 ... Post by: bio_man on May 19, 2020 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.
Title: Re: Problem 1: A report states that on average Moroccan boys (12-18 years old) get a haircut 5.8 ... Post by: Amanda387 on May 19, 2020 I still don't understand the solution of problem 1
Title: Re: Problem 1: A report states that on average Moroccan boys (12-18 years old) get a haircut 5.8 ... Post by: bio_man on May 19, 2020 I still don't understand the solution of problem 1 Which part? Did you watch the video that came with it? Title: Re: Problem 1: A report states that on average Moroccan boys (12-18 years old) get a haircut 5.8 ... Post by: Amanda387 on May 19, 2020 yes i did but i found it difficult
Title: Re: Problem 1: A report states that on average Moroccan boys (12-18 years old) get a haircut 5.8 ... Post by: bio_man on May 19, 2020 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? Title: Re: Problem 1: A report states that on average Moroccan boys (12-18 years old) get a haircut 5.8 ... Post by: bio_man on May 19, 2020 Answer to question 2:
(https://biology-forums.com/gallery/41/6_19_05_20_3_28_13.png) (https://biology-forums.com/index.php?action=gallery;sa=view&id=41692) (https://biology-forums.com/gallery/41/6_19_05_20_3_28_21.png) (https://biology-forums.com/index.php?action=gallery;sa=view&id=41693) Title: Re: Problem 1: A report states that on average Moroccan boys (12-18 years old) get a haircut 5.8 ... Post by: Amanda387 on May 19, 2020 now i understand thank you
Title: Re: Problem 1: A report states that on average Moroccan boys (12-18 years old) get a haircut 5.8 ... Post by: mimifa21 on Jun 1, 2020 thank you
Title: Re: Problem 1: A report states that on average Moroccan boys (12-18 years old) get a haircut 5.8 ... Post by: bio_man on Jun 1, 2020 Title: Re: Problem 1: A report states that on average Moroccan boys (12-18 years old) get a haircut 5.8 ... Post by: Mourad Ahmed on May 22, 2021 thank you
Title: Re: Problem 1: A report states that on average Moroccan boys (12-18 years old) get a haircut 5.8 ... Post by: smi3 on May 30, 2022 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? H;μ=μ0 μ0=91600 n=28 xbar=88500 σ=10000 test static z0=xbar-μ0/(σ/√n) =-1.64 zα=z0.1=1.28 since z0>-zα Hypothesis is correct Title: Re: Problem 1: A report states that on average Moroccan boys (12-18 years old) get a haircut 5.8 ti Post by: Mellissav92 on May 23, 2023 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) |