What are the calculations/answer to create a 90% and 95% confidence internal for this sample?
Q: A political candidate has asked you to conduct a poll to determine what percentage of people support…
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Q: what is atypical sample
A: Atypical sample means something Unusual
Q: Compute the margin of error of the 90% confidence level when a = 3 and n= 30
A: Given that ?=3 , n=30 Formula for margin of error E=Zc*?/√(n)
Q: What is the role of the sample size in the determination of confidence interval? Explain.
A: Let us first define sample size and confidence interval. Sample size: It is determination of the…
Q: A political candidate has asked you to conduct a poll to determine what percentage of people support…
A: Given : A political candidate has asked you to conduct a poll to determine what percentage of…
Q: A political candidate has asked you to conduct a poll to determine what percentage of people support…
A: It is given that the margin of error (E) is 0.08.
Q: A political candidate has asked you to conduct a poll to determine what percentage of people support…
A: GivenMargin of Error(E)=0.03Confidence Interval(c)=90%Let p^=0.5α=1-0.90=0.10α2=0.05zα2=z0.05=1.6449…
Q: How do I calculate a 95% confidence level for a sample proportion in excel? Meaning, what formula…
A: Given : Confidence level = CL = 95% = 0.95
Q: The internal auditing staff of a local manufacturing company performs a sample audit each quarter to…
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Q: Explain which would result in a wider large-sample confidence interval for : a 90%pconfidence level…
A: The z critical value for 95% confidence interval is 1.96 and the z-critical value for 90% confidence…
Q: What does a 95% confidence level mean?
A: The 95% confidence level means that if the hypothesis test is repeated on the certain process, then…
Q: A political candidate has asked you to conduct a poll to determine what percentage of people support…
A: The formula for the sample size is as follows: Here, zα/2 is the critical value at 99% confidence…
Q: If the candidate only wants a 7% margin of error at a 99% confidence level, what size of sample is…
A: Since you have asked multiple question, we will solve the first question for you. If you want any…
Q: How will you explain a confidence interval and a hypothesis test to a businessperson who does not…
A: A confidence interval tell us the probability that estimated population parameter lie with in the…
Q: A magazine provided results from a poll of 2000 adults who were asked to identify their favorite…
A: A magazine provided results from a poll of 2000 adults who were asked to identify their favorite…
Q: A political candidate has asked you to conduct a poll to determine what percentage of people support…
A: Determine the size of sample is needed. The size of sample is needed is obtained below as follows:…
Q: 1. For a 95% confidence level, what are the critical values fora one-tailed test? 2. For a 99%…
A: Given that 95% confidence level and 99% confidence level.
Q: A political candidate has asked you to conduct a poll to determine what percentage of people support…
A: It is given that the confidence level is 0.90 and margin of error (E) is 0.01.
Q: a magazine provided results from a poll of 2000 adults who were asked to identify their favorite…
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Q: If you think a data point is an outlier, what test can you perform to see if you should omit the…
A: Given that the number of data points in the set is 8.
Q: A political candidate has asked you to conduct a poll to determine what percentage of people support…
A: From the provided information, Margin of error (E) = 7% that is 0.07 Confidence level = 98% Assuming…
Q: If we wanted to reduce the margin of error to 3.5 per cent, how big would our sample ze have to be…
A: We have given that, Margin of error (E) = 3.5% = 0.035 and confidence level = 95% = 0.95 Then, We…
Q: A 97% confidence interval for proportion is found to be (.221,.623) the margin of error is what
A: The 97% confidence interval for proportion is given as (0.221, 0.623)
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: A magazine provided results from a poll of 1000 adults who were asked to identify their favorite…
A: Given: Number of adults = 1000 Percentage of people who chose chocolate = 13% Margin of error =…
Q: A political candidate has asked you to conduct a poll to determine what percentage of people support…
A: Here, there is no information about the population parameter. Hence, use the conservative estimate…
Q: A political candidate has asked you to conduct a poll to determine what percentage of people support…
A: To find: The sample size needed.
Q: A political candidate has asked you to conduct a poll to determine what percentage of people support…
A:
Q: A political candidate has asked you to conduct a poll to determine what percentage of people support…
A: Let P be the population proportion (might be a hypothesized value), p be the sample proportion and α…
Q: a magazine provided results from a poll of 2000 adults who were asked to identify their favorite…
A: Given Information: A magazine provided results from a poll of 2000 adults who were asked to identify…
Q: How can we interpret a 95% confidence interval?
A: How to interpret a 95% confidence Interval? We know that, Confidence Interval is defined as the…
Q: Explain the Interpretation of confidence level.
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Q: Explain the effect on the margin of error and hence the effect on the accuracy of estimating a…
A: Effect on margin of error: If the sample size increases, then the standard error of statistic…
Q: A political candidate has asked you to conduct a poll to determine what percentage of people support…
A: Obtain the sample size of a no preliminary estimate for p. The formula of sample size is, Use EXCEL…
Q: A political candidate has asked you to conduct a poll to determine what percentage of people support…
A: Given:Margin of error (E) = 0.09Confidence level = 90%Since, the proportion of people that support…
Q: A university planner wants to determine the proportion of undergraduate students who plan to attend…
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Q: How does an observed sample mean qualify as a common outcome?
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Q: A magazine provided results from a poll of 500 adults who were asked to identify their favorite…
A: It is given that the sample size is 500.
Q: A political candidate has asked you to conduct a poll to determine what percentage of people support…
A: Find z-critical value:…
Q: A political candidate has asked you to conduct a poll to determine what percentage of people support…
A:
Q: What is Sample Mean?
A: A statistical population is a set of entities from which statistical inferences are to be drawn,…
Q: A poll asked the question, "What do you think is the most important problem facing this country…
A: Given information- Point estimate, p = 0.25 Margin of error = 0.04 Confidence level, c = 0.95 We…
Q: A political candidate has asked you to conduct a poll to determine what percentage of people support…
A: Given that, Margin of error = 3% = 0.03 99% confidence level
Q: A magazine provided results from a poll of 1500 adults who were asked to identify their favorite…
A:
Q: political candidate has asked you to conduct a poll to determine what percentage of people support…
A:
Q: A political candidate has asked you to conduct a poll to determine what percentage of people support…
A: As there is no any estimates available, the sample proportion is assumed to be 0.50, that is,…
Q: The president’s policy on domestic affairs received a 45% approval rating in a recent poll. The…
A: confidence interval for population proportion p : consider a sample size n employed to measure the…
Q: Explain the difference between the family confidence level and the individual confidence level.
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Q: Explain the concept of a 95% confidence interval for the population mean ? by listing (and…
A: 95% confidence interval is an interval in which the population mean falls with probability 0.95 For…
Q: A magazine provided results from a poll of 1000 adults who were asked to identify their favorite…
A: Given,sample size(n)=1000sample proportion(p)=0.14
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- A political candidate has asked you to conduct a poll to determine what percentage of people support her. If the candidate only wants a 2% margin of error at a 97.5% confidence level, what size of sample is needed?A university dean is interested in determining the proportion of students who receive some sort of financial aid. Rather than examine the records for all students, the dean randomly selects 200 students and finds that 118 of them are receiving financial aid. Use a 90% confidence interval to estimate the true proportion of students on financial aid. Express the answer in the form p ± E and round to the nearest thousandth.What would be the Excel formula to determine the Margin of Error if you have a 95% confidence level and a sample size of 60? Would you need to include a 1 degree of freedom and use a sample size of 59?
- A political candidate has asked you to conduct a poll to determine what percentage of people support her.If the candidate only wants a 8% margin of error at a 90% confidence level, what size of sample is needed? What value did you use for ˆpp^ ? Why did you choose that value?A political candidate has asked you to conduct a poll to determine what percentage of people support her.If the candidate only wants a 10% margin of error at a 90% confidence level, what is the sample size that is needed?Give your answer as a whole number.
