If your target population is 123, how many samples do you need for a sampling error of .05 and a level of confidence of 95 percent (.05 level)? Show your solution.

Q: Suppose the sample mean is 5.0 and with 95% confidence, the margin of error is 2.5. Then, the…

A: Given: Sample mean, x¯=5confidence level=95%Margin of error, E=2.5

Q: For a population data set, σ = 13.3 . How large a sample should be selected so that the margin of…

A: From the given information, confidence level  Level of significance  Margin of error E = 2.50.…

Q: A researcher wishes to estimate the percentage of adults who support abolishing the penny. What size…

A: Margin of Error(E)=0.05For 99% confidence level Zα2=2.576 Formula; E=Zα2×(p×(1-p)n)

Q: If X = 114, α= 20, and n = 33, construct a 99% confidence interval estimate for the population mean,…

A: Given data:  Sample Mean = 114 Population standard deviation = 20 Sample size = 33 Confidence level…

Q: If we want to be within 0.02 of the true proportion of homes that have a direct television receiver…

A: The population proportion is 82%, the confidence level is 98% and estimate is within 0.02.…

Q: If X=70​, σ=14​, and n=61​, construct a 99​% confidence interval estimate of the population​ mean,…

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Q: (b) What sample size should be obtained if he wants to be within 4 percentage points with 95%…

A: B) It is given that margin of error (E) is 0.04 and the confidence level is 0.95.

Q: Kim wants to determine a 80 percent confidence interval for the true proportion of high school…

A: Given: Margin of error, E=0.04 Confidence level=80%

Q: If n = 330 and X = 264, construct a 95% confidence interval for the population proportion, p.

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Q: For the provided sample​ mean, sample​ size, and population standard​ deviation, complete parts​ (a)…

A: Given data,n=100x=22σ=3z-value at 95% confidence is Zc=1.96

Q: A television sports commentator wants to estimate the proportion of citizens who​ "follow…

A: Solution: a. From the given information, confidence level is 0.96, p=0.48 and E=0.03.

Q: Use z =2.576 If the margin of error for the population mean for 99% Confidence Level is 39, what…

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Q: In order to estimate the population proportion with a high school education,  you need a minimum…

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Q: kendall wants to estimate the percentage of vegetarians who are also vegan. She surveys 150…

A: The margin of error for the 95% confidence interval of population proportion is given as follows :…

Q: A researcher wishes to estimate the percentage of adults who support abolishing the penny. What size…

A: GivenMargin of error(E)=0.03confidence level(c)=99%α=1-0.99=0.01α2=0.05zα2=z0.05=1.6449   (from…

Q: In a survey, the planning value for the population proportions P* = 0.5. How large a sample should…

A: Given,population proportions (p*)=0.5margin of error (E)=0.04α=1-0.90=0.1α2=0.05Z0.05=1.645  (from…

Q: Although Nielsen Media research determined the precise proportion of all Americans watching the…

A: Given : Nielsen Media research determined the precise proportion of all Americans watching the super…

Q: Suppose that a 95% confidence interval for a population p = the population proportion of men who…

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Q: If the Census wants to increase its level of confidence and keep the error bound the same by taking…

A: Given information: The census wishes to increase the level of confidence (c). The error bound (MoE)…

Q: In a survey, the planning value for the population proportion is .25. How large a sample should be…

A: We have to find sample size..

Q: If X=72​, σ=13​, and n=66​, construct a 95​% confidence interval estimate of the population​…

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Q: What must be true about the sampling method and the values of p, q, and n in order to construct a…

A: For constructing Confidence interval for proportion, following assumptions need to be care

Q: If you knew that I study reported that 67% of pre-kindergarten children ages 3 to 5 whose mother had…

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Q: b. Calculate a 95% confidence interval for the proportion of the population who have been told they…

A: b. A sample 1,414 adults are taken for a survey to ask the question that "Have you ever been told…

Q: A physical therapist wants to determine the difference in the proportion of men and women who…

A: It is given that there is 95% confidence.

Q: Use the confidence interval to find the margin of error and the sample mean. (1.59,1.89)

A: Given data,Lower limit=1.59Upper limit=1.89Margin of error=?

Q: In preparing a report on the economy, we need to estimate the percentage of businesses that plan to…

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Q: It is known that the population variance (σ2) is 125. At 95% confidence, what sample size should be…

A: Given information- Population variance (σ2) is 125 Confidence interval = 0.95 Significance level (α)…

Q: 1. How many samples must be considered from a population of 28,000 students, if 5% margin of error…

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Q: NASA is interested in the true proportion of children who are interested in becoming astronauts. At…

A: Disclaimer: Since you have asked multiple questions, we will solve the first question for you. If…

Q: A researcher calculates a 90% confidence interval of (0.24,0.4) for a proportion. What was the…

A: We have given 90% confidence interval for proportion then we have to find the sample size for the…

Q: or a sample of 121 that has a mean of 6540 and a standard deviation of 780, calculate the 90%…

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Q: If you want to be 95​% confident of estimating the population proportion to within a sampling error…

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Q: If n=400 and X=100​, construct a 99​% confidence interval estimate for the population proportion

A: According to the given information, we have n = 400 X = 100 Confidence level = 99%

Q: An internet service provider wishes to estimate, to within five percentage error, the current…

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Q: estimate the population proportion p,what is the minimum sample size we need in order to achieve a…

A: Solution: From the given information, confidence level is 0.95, p=0.1 and E=0.01.

Q: find the margin of error at a 90% confidence level

A: Given : n=330 , p-hat=0.28  , α=0.10 We want to find the margin of error at a 90% confidence level.

Q: 12) Find the sample size need to find the Population Proportion if the margin of error is 5%, the…

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Q: If n=570 and ˆpp^ (p-hat) =0.89, find the margin of error at a 95% confidence levelGive your answer…

A: It is given that the value of n is 570, p hat is 0.89 and the confidence level is 0.95.Here,

Q: If X=68​, σ=14​, and n=66​, construct a 95​% confidence interval estimate of the population​ mean, μ

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Q: A researcher wishes to estimate the percentage of adults who support abolishing the penny What size…

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Q: what sample size should a researcher take if he wants to estimate a population proportion to be 2%…

A: From the given information,   Margin error = 0.02 Assume sample proportion = 0.5   Critical value:…

Q: previous election, the confidence interval for the proportion of likely voters who would vote for…

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Q: Which store do you think is more expensive—physical or online? A recent survey found that 45% of…

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Q: Beth wants to determine a 99% confidence interval for the true proportion of high school students in…

A: Suppose p is the true proportion of high school students in that area who attend their home…

Q: How large must the sample size be in order to to estimate a true proportion to within one percentage…

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Q: A researcher wishes to estimate the percentage of adults who support abolishing the penny . What…

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Q: A researcher wishes to estimate the percentage of adults who support abolishing the penny. What size…

A: a) Given that: p= previous estimate = 32% =0.32 e= error= 3%=0.03 z=critical value for confidence…

Q: Solve for the sample size with the assumption that the confidence coefficient is 95% and second, the…

A: Sample size estimation is integral part of inferential statistic.

Q: What does the SEM value tell us about the magnitude of sampling error?

A: Introduction: Suppose a random sample of size n is taken from a population with mean μ and standard…