At what confidence level will an estimate with margin of error + 1.4758 be for a sample size n2 30?

Q: a. How large a sample size is necessary if the width of the 95% interval is to be 40? d. What sample…

A: Given Information: The helium porosity is normally distributed with standard deviation of 0.75…

Q: Use the given confidence interval to find the margin of error and the sample proportion.…

A: Given,   Lower bound = 0.702 Upper bound = 0.730   The objective is to find the margin of error and…

Q: What is the approximate sample size required to estimate the percentage of Americans who have earned…

A: When we don't have any prior information about the population proportion, we generally take it as…

Q: Given that the population standard deviation is 5.6, determine the minimum sample size needed in…

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Q: Use the given confidence interval to find the margin of error and the sample proportion.…

A: The confidence interval is 0.679,0.707. The margin of error is, E=Upper bound-Lower…

Q: What is the minimum sample size necessary to construct a 90% confidence interval for with a margin…

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Q: Determine the value of z, that would be used in constructing a 90%confidence interval for a 2.…

A: Z = x-μσ, Where μ = population mean,           σ = population variance,           x = observed…

Q: Find the sample size necessary for a 99% confidence level with maximal margin of error E = 2.00 for…

A: Solution

Q: the given confidence interval to find the margin of error and the sample mean. (13.8,22.6) sample…

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Q: Find the margin of error E assuming that a simple random sample is used to estimate a population…

A: The margin of error is a statistic expressing the amount of random sampling error in the results of…

Q: Use the given data to find the minimum sample size required to estimate the population proportion.…

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Q: Assume that a sample is used to estimate a population proportion p. Find the 95% confidence interval…

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Q: What is the minimal sample size needed for a 95% confidence interval to have a maximal margin of…

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Q: The estimated prevalence is 11%, and the desired confidence level is 91% with a margin of error of…

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Q: a. How many workers are there in each stratum? b. Estimate the mean forced vital capacity among the…

A: Here population is 1200(i.e. workers employing at a plant). Out of 1200 sample is taken of size 40.…

Q: Use the given confidence interval to find the margin of error and the sample proportion.…

A: The formula of the margin of error using the confidence limits is, Where,   UCL denotes the upper…

Q: How large a sample should be selected to provide a 95% confidence interval with a margin of error of…

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Q: Find the sample size necessary for an 80% confidence level with a maximal margin of error E= 0.07…

A: Given that s.d =0.34,alpha =0.2,E =0.07 ( e) n= ?

Q: For a confidence level of 98% with a sample size of 12, find the critical value.

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Q: Assume that a sample is used to estimate a population proportion p. Find the margin of error M.E.…

A: Given that  Assumed that the sample is used to estimate a population proportion p. Sample size (n) =…

Q: With an 80% confidence for sample proportion 46 and sample size 29, what is the upper confidence…

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Q: Determine the margin of error for an 80% confidence interval to estimate the population mean with…

A: Given that  Confidence level (C) = 80%  Population standard deviation (σ) = 48   We know that…

Q: What sample size is needed to estimate a population mean within t 70 of the true mean value using a…

A: According to the provided information, Population standard deviation (σ) = 140.625 Confidence level…

Q: Use the given data to find the minimum sample size required to estimate the population proportion…

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Q: In a study of government financial aid for college​ students, it becomes necessary to estimate the…

A: a. From the given information, Margin of Error ME=0.04p=0.5q=1-p=1-0.5=0.5zα2=z0.012=z0.005=2.576…

Q: The estimated prevalence is 25% and the desired confidence level is 95% with a margin of error of 8%…

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Q: Find the sample size necessary for a 95% confidence level with maximal margin of error E = 1.20 for…

A: Standard Deviation = σ = 1.89 Margin of Error = E = 1.2 Confidence Level = 95 Significance…

Q: Use the given confidence interval to find the margin of error and the sample proportion.…

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Q: Given that the population standard deviation is 1, determine the minimum sample size needed in order…

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Q: Find the critical value corresponding to a sample size of 19 and a confidence level of 99%

A: Since 19 is less than 30. So we must use t-distribution.  Degrees of freedom=n-1=19-1=18…

Q: Find the sample size needed to estimate the percentage of residents of one region of a country who…

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Q: Use the given data to find the minimum sample size required to estimate the population proportion.…

A: From the given information, Margin error = 0.04 Sample proportion = 0.60   Critical value: Using…

Q: Use the given confidence interval to find the margin of error and the sample proportion.…

A: Confidence interval is given, (0.619, 0.647)

Q: Find the error bound for an unknown population mean or the margin of error that corresponds to a 85%…

A: Find the error bound for an unknown population mean or the margin of error that corresponds to a 85%…

Q: Use the given confidence interval to find the margin of error and the sample proportion.…

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Q: Use the given confidence interval to find the margin of error and the sample proportion.…

A: According to the given information, we have Given confidence interval = (0.675, 0.703)

Q: use the given data to find the minimum sample size required to estimate a population proportion or…

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Q: Use the given confidence interval to find the margin of error and the sample proportion.…

A: Solution: From the given information, the confidence interval for the population proportion is…

Q: For a left-tailed test conducted using a sample greater than 30, and 89.8% confidence level, the…

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Q: 2. Given a random sample with size 39 taken from a normally distributed population or 200 members,…

A: Given : n= 39 x¯=66 σ=11

Q: Use the given confidence interval to find the margin of error and the sample proportion.…

A: From the given information confidence interval is ( 0.692 , 0.72)

Q: Use the given confidence interval to find the margin of error and the sample proportion.…

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Q: use the given data to find the minimum sample size required to estimate the population proportion.…

A: find the minimum sample size required to estimate the population proportion. margin of error:0.07;…

Q: Use the given confidence interval to find the margin of error and the sample proportion.…

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Q: For the specified margin of error and confidence​ level, obtain a sample size that will ensure a…

A: As nothing about proportion is given So, p = 0.5

Q: For the specified margin of error and confidence​ level, obtain a sample size that will ensure a…

A: From the provided information, Margin of error (E) = 0.05 Confidence level = 95%

Q: Use the given confidence interval to find the margin of error and the sample proportion.…

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Q: Recently, the Centers for Disease Control and Prevention estimated 9.4% of children under the age of…

A: Given mean estimate is 9.4%. Standard error is 0.35% Confidence level is 95%. from the z table, the…