The campus wellness center wants to estimate the proportion of students that are getting at least 7 hours of sleep every night during finals week, and they require an estimate with 99% confidence and an error margin of no more than 0.05. (a) If a similar survey from last year showed that p̂ = 0.38, what is the minimal number of students that must be surveyed this year? (b) If the center decides their data from last year is not comparable to this year due to the circumstances of online final exams, and so has no prior information regarding p̂, what is the minimal sample size needed?

Q: A coin-operated coffee machine made by BIG Corporation was designed to discharge a mean of eight…

A: Formula :

Q: A coin-operated coffee machine made by BIG Corporation was designed to discharge a mean of eight…

A: Population standard deviation()=0.42Margin of error(E)=0.07

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Q: A coin-operated coffee machine made by BIG Corporation was designed to discharge a mean of eight…

A: The standard deviation: .The margin of error: The confidence level:

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A:

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A:

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A: Givenmargin of error(E)=0.09Variance(σ2)=1.96standard deviation(σ)=1.96=1.4confidence level=80%

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A: Solution: Given information: k= 2  Categories  N= 350   total observation ( frequency )   f0= 188…

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A: Here data is negatively(right) skewedmore data at higher end

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A: Let SD be Statistical Discrimination

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A:

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A: We have given that  p=72%=0.72. ,q=1-p=1-0.72=0.28 n=6 X~Binomial(n=6,p=0.72) The pmf of Binomial…

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A:

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A:

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A:

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A: It is given that a study conducted by National Institute of child health and human development.

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Q: coin-operated coffee machine made by BIG Corporation was designed to discharge a mean of eight…

A: Formula for the sample size needed to estimate a population mean is

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A:

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A: Note: Hi there! Thank you for posting the question. As you have posted multiple questions, as per…

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Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.