The business college computing center wants to determine the proportion of business students who have personal computers (PC's) at home, because if the proportion exceeds 25%, then the lab will scale back a proposed enlargement of its facilities. Suppose 300 business students were randomly sampled and 65 have PC's at home. Should they use a hypothesis test or a confidence interval to answer this question?   a) Hypothesis test. b) Confidence interval.

Q: 2. Suppose that you take a random sample of 360 people who voted in the last election in a heavily…

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Q: uring an election, Kevin and Britney took a poll of 1,200 voters, and asked what the most…

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Q: In your work for a real estate company, you find that in a sample of 1762 home buyers, 722 found…

A: Given Data: x=722 n=1762   p^=7221762=0.4098

Q: A political candidate has asked you to conduct a poll to determine what percentage of people support…

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Q: shorter than 60 hours

A: For the given data : sample size, n = 10 sample mean, x̄ = 59.5 sample standard…

Q: In a random sample of 100 voters in a school district, 40 of them stated they were in favor of the…

A: Solution: Let X be the number of voters stated they were in favor of the school district bond…

Q: The business college computing center wants to determine the proportion of business students who…

A: As Prof. N. G. Das said - "Testing of hypothesis is a rule which, when the sample values have been…

Q: An epidemiologist is worried about the prevalence of the flu in East Vancouver and the potential…

A: The random variable flu follows binomial distribution. X ~ B (n, p). The sample size is 337. The…

Q: Write a sentence demonstrating how the results from the hypothesis test and the confidence interval…

A: From the results, the 90% confidence interval to estimate the mean exam score is (68.6670, 75.7331).

Q: In a survey of 1400 people, 75% indicated that they listened to their favorite radio station because…

A: In statistical inference there are two branches-1)hypothesis testing and 2)Estimation In estimation…

Q: A principal of a large high school wants to estimate the true proportion of high school students who…

A: Given information- Sample size, n = 50 For a random sample of 50 students, the 95% confidence…

Q: Increasing the sample mean would cause a confidence interval to (a) shift left (b) shift right (c)…

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Q: Explain why you should get a much better prediction for μ by using x from a sample size n rather…

A: The confidence interval on mean is given as x-Zα2sdn≤μ≤x-Zα2sdn where  μ=population meanx=sample…

Q: The College of Graduate Studies at MNSU claims that more than 60% of undergraduate students at this…

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Q: A pollster wanted to predict the upcoming results of the 2020 presidential elections in a local…

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Q: 324 out of a simple random sample of 400 students hated their online math course. Find a 99%…

A: Given: Number of students that hated the online math course (y) = 324 Number of students (n) = 400…

Q: A principal of a large high school wants to estimate the true proportion of high school students who…

A: Given that  Sample size n =50 95 % confidence interval.  (0.25 , 0.34 )

Q: Facebook would like to study the demographics of the individuals that utilize their platform. Their…

A: a. The sample size n= 455. Out of the 455 Facebook users 63 were teenagers. The sample proportion is…

Q: Refer to the following scenario. An epidemiologist is worried about the prevalence of the flu in…

A: The formula of sample size is, Use EXCEL Procedure for finding the critical value of z.   Follow…

Q: You plan to conduct a survey to find what proportion of the workforce has two or more jobs. You…

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Q: What is the relationship between α and the confidence level of a hypothesis test?

A: In hypothesis testing, α is the level of significance, which provides details about the chance of…

Q: The Bangor Humane Society tracks cat adoptions closely, and in the past has seen 60% of people who…

A: Here we have to test: H0: P≥0.60  Vs  Ha: P<0.60 where P is true proportion of people's who…

Q: An investigative reporter contacts a random sample of hotels, and finds a 95% confidence interval…

A: Given that  The 95% confidence interval for the proportion of hotels in the united states have…

Q: A survey of 225 randomly chosen commuters are asked if they support an expanded public…

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Q: 2. A large university conducted a sample survey of 100 first-year students and 100 seniors. Both…

A: given that,sample one, x1 =32, n1 =100, p1= x1/n1=0.32sample two, x2 =38, n2 =100, p2=…

Q: A university dean is interested in determining the proportion of students who receive some sort of…

A: Given that, X = 118 N = 200 99% confidence level

Q: A regional survey of 561 companies asked the vice president of operations how satisfied he or she was…

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Q: You are trying to estimate the percent of people in California who have a college degree. You…

A: Given that  Sample size n =60 Favorable cases x =18 Sample proportion p^=x/n  =18/60 =0.3

Q: Refer to the following scenario. An epidemiologist is worried about the prevalence of the flu in…

A: To find the sample size required for estimating the population proportion with a 95% confidence…

Q: A marketing survey involves product recognition in New York and California. Of 679 New Yorkers…

A: given data  n1 = 679    x1 = 256p^1 = x1n1 = 256679 = 0.3370 n2 = 631    x2 = 208 p^2 = x2n2 =…

Q: An epidemiologist is worried about the prevalence of the flu in East Vancouver and the potential…

A:

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.