6. A hospital wants to estimate the proportion of patients who needed a second visit with a 95% confidence interval. Estimate the maximum sample size needed so that the margin of error does not exceed 5%.
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A: Given that ?=3 , n=30 Formula for margin of error E=Zc*?/√(n)
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Q: suppose that we want a 95% confidence interval for π = proportion of defectives if we observe 4…
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A: Solution: From the given information, confidence level is 0.92 and E=0.03.
Q: 1. How is the expected length of a confidence interval related to the margin of error?
A: here use basic of confidence interval
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Q: You wish to determine what percentage of pre-kindergarten children ages 3 to 5 whose mother had a…
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A: Given information: The sample mean is, M = 13 The error bound for the mean is, E = 3.2 It is…
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Q: 1. The Hartford Insurance Company wants to estimate the percentage of drivers who change tapes or…
A: Please see the attachment..
Q: 7. Why is a confidence interval also called a "margin of error"?
A: Margin of error allows us to feel confident a certain percentage of the time within a range of…
Q: 7) The state education commission wants to estimate the proportion of tenth grade students that have…
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Q: 22. The probability that a 95% confidence interval calculated from a random sample of a normally…
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Q: Suppose you are planning to construct a 23% confidence interval for a one sample population…
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Q: If 64% of a sample of 550 people leaving a shopping mall claims to have spent over $25 create and…
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A: 8. A study was conducted on hearing impairment among workers in a construction site.
Q: 9. How can you make a 95% confidence interval smaller without changing the confidence level?
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Q: A sociologist wants to construct a 96% confidence interval for the proportion of children aged 5 –…
A: The z-value for 96% confidence is2.054 ∴ z∝12=2.054a)Given data ,P=0.20M.E=0.02n=?W.C.T…
Q: Find the minimum sample size required to construct a 95% confidence interval estimate for the…
A: From the provided information, Margin of error (E) = 3.5% or 0.035 Confidence level = 95%
Q: 3. A large automobile manufacturing plant produces 1200 new cars every day. A quality-control…
A: Hi, we are supposed to answer three sub parts at a time. Since you have not mentioned which subpart…
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A: It is given that margin of error (E) is 0.14 and the confidence level is 0.80.
Q: The Labor Bureau wants to estimate, at a 90% confidence level, the proportion of all households that…
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Q: 9. What sample size is needed to give a margin of error of 2.5% with a 95% confidence level?
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Q: How many subjects would be needed to ensure that a 95% confidence interval estimate of BMI had a…
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Q: 3. A large automobile manufacturing plant produces 1200 new cars every day. A quality-control…
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Q: What is the minimum required sample size to make a 96% confidence interval for a population mean if…
A: Margin of error=E=2 Standard deviation=σ=12 96% confidence interval E=Zc×σ/√n n=sample size
Q: 9. Find the minimum sample size needed to be within a margin of error of 2% of the population…
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Q: Provide a problem statement that involves calculation for the length of confidence interval and…
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Q: What is the smallest sample size that guarantees that the margin of error is less than 3% when…
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Q: A researcher wishes to estimate the 95% confidence interval of the proportion of students who show…
A: Given e=Margin of error=30%=0.30, p^=30%=0.30, level of significance ɑ=0.05
Q: 2. A sample of 430 business applications included 150 men. Find the 99% confidence interval of the…
A: Answer:- Given, X=150 n=430
Q: Suppose that a state wants to access the public opinion on the proposal that drivers who are 65…
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Q: Assume that all grade-point averages are to be standardized on a scale between 0 and 6. How many…
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Q: 2.2% is your desired margin of error in percentage points. Find the sample size required to develop…
A: Proportion value p is not provided but as is the norm, we will assume p =0.5.
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- What is meant by the sample space of an experiment?2.2% is your desired margin of error in percentage points. Find the sample size required to develop an 86% confidence interval on a population proportion that will result in that margin of error.A researcher wants to estimate, at 92% confidence level, the prportion of covid-19 symptomatic patients have diabetes. The researcher wants to estimate to be within 3% points from the true proportion. What is the sample size needed if we have no pre-estimate of the proportion?
- The Green party of Canada is planning on conducting a survey to estimate the proportion of Canadians that would support a move that would see all federal buildings powered without the use of fossil fuels by the year 2040. If they want to be sure of there estimate to a margin of error of 3% to a 90% confidence level, what minimum sample size should they use?Find the minimum sample size required to construct a 95% confidence interval estimate for the proportion of consumers who intend to purchase a new mobile phone in the next year if the required margin of error is 3.5%Calculate the minimum sample size required in order to make a 95% confidence interval for a population mean when σ = 4.5 and the margin of error is to be no more than 1.2.
- 2. The Vice-Chancellor of a university is concerned that illicit drug use on campus is higher than the 5% acceptable level. A random sample of 140 students revealed that 5 of them had used illicit drug during the last 12 months. Construct a 90% confidence interval to estimate the true proportion of students who use illicit drug. Should the Vice-Chancellor be concerned?Suppose a 90 percent confidence interval to estimate a population proportion was calculated from a sample proportion of 18 percent and a margin of error of 4 percent. What is the width of the confidence interval?3.To obtain an estimate of the proportion of ‘full time’ university students who have a part time job in excess of 20 hours per week, the student union decides to interview a random sample of full time students. They want the length of their 95% confidence interval to be no greater than 0.1. and assume variance is equal to 4. What size sample, n should be taken?
