We want to determine the mean weight of a certain type of fish. If we also want to estimate u to within 0.05 gram with a confidence level of 0.95, how large must the sample be if o is 2.5?

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: If n=400 and X=100​, construct a 95​% confidence interval estimate for the population proportion.

A: Given,x=100n=400sample…

Q: If you wish to estimate a population mean with a sampling distribution error SE = 0.28 using a 95%…

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Q: We want to estimate a population proportion with a 95% confidence interval and we want the margin of…

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Q: a. Suppose you are with a health agency that wants to estimate what percentage of Ohioans really has…

A: Hi, we are supposed to answer one question at a time. Therefore, I am answering the question -a.…

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: Suppose that the sample size had been​ 240, with x bar=4.1 and s=3.1. Use technology to find a​ 95%…

A: Sample mean = x̅ = 4.1 Sample size = n = 240 Sample S.D = s = 3.1 Standard Error = s/√n  =…

Q: What is the critical value t* for constructing a 95% confidence interval for a mean from a sample…

A: The objective is finding the critical value for constructing a 95% confidence interval for a mean.

Q: A sample of size 10 has a sample mean of 1000. Knowing that o?=100, then a 95% Confidence Interval…

A: We want to find confidence interval Here z will be used as population standard deviation is known

Q: When using a one-sample z-procedure to construct a confidence interval for the proportion of a…

A: When using a one sample z procedure to construct a confidence interval for the proportion of a…

Q: Determine the margin of error for a confidence interval to estimate the population mean with n = 21…

A: n = 21  s​ = 12.6 confidence interval = 80%.

Q: With a large sample size such as n = 100, we do not need to assume the distribution is normal in…

A: True.Central limit theorem:In the process of selecting a simple random samples of size n from a…

Q: Find the CRITICAL VALUE of zα/2 that corresponds to a confidence level of 83.33%.

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Q: If n=300 and X=120​, construct a 99​% confidence interval estimate for the population proportion.…

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Q: Find the minimum sample size you should use to assure that your estimate of p will be within a…

A: We have to find sample size required.

Q: Find the critical value, for a 90% confidence when the sample size is 22.

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

A: Given Information: Margin of​ error: 0.03​ confidence​ level: 99% p is estimated by 0.13

Q: If X 121, o =27, and n 38, construct a 95% confidence interval estimate of the population mean, u.…

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Q: A t value is to be used in calculating a 99% confidence interval for the population mean μ, based on…

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Q: If the sample size is reduced by 25%, which of the followings is true about the change in the length…

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Q: Find the sample size needed for a confidence interval about the population proportion if you want a…

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Q: A sample of size 26 has a sample variance of 100. Then a 90% Confidence Interval for o? is < o? <

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

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Q: If we were to ask for a minimum sample size for a 94% level of confidence what would the value for…

A: Confidence Level = 0.94

Q: Use the sample information X = 36, o= 7, n= 16 to calculate the following confidence intervals for µ…

A: (a). Find the 90% confidence interval for the population mean µ: Denote the population mean as µ.…

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

A: Given information: The sample mean is x-bar = 36.1. The sample standard deviation is s = 15.2. The…

Q: Given a sample of size n = 15 with x=12.5,s=2.9. Estimate the population mean with 95% of confidence…

A: Given problem Given that   n = 15 x-bar = 12.5 s = 2.9

Q: If we want a 96% confidence interval on population mean with a sample size of 23, find zα2 or tα2

A: It is given that the confidence level is 96%.

Q: What is the value of tα/2 for a sample of size n=39 at the 90% level of confidence?

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Q: Assume that a sample is being used to estimate a population mean μμ. If n = 29, x¯ = 46, and s =…

A: From the provided information, Sample size (n) = 29 Sample mean (x̅) = 46 Sample standard deviation…

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

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Q: What is the smallest sample size required to provide a 95% confidence interval for a mean, if the…

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Q: find the critical value z a/2 that corresponds to a 93% confidence level

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Q: 5. If the error for estimating µu was within 4 units, how many should we sample at 98% Confidence…

A: Given information- Error, E = 4 units Confidence level, c = 98% Standard deviation, s = 29 Margin of…

Q: Assume that a sample is being used to estimate a population mean μμ. If n = 19, x¯ = 43, and s = 3,…

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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: If X=116, o = 26, and n=32, construct a 95% confidence interval estimate of the population mean, u.…

A: Given: n= 32.0 , x̄= 116.0 σ= 26.0 At 95.0 % confidence level , z score= 1.96

Q: 4. How large a sample must be taken to estimate the proportion of households in which a cell phone…

A: In probability theory, a normal distribution is a type of continuous probability distribution for a…

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

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Q: If n = 300 and X = 75, construct a 95% confidence interval estimate for the population proportion.…

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Q: If X = 143, o = 29, and n = 35, construct a 95% confidence interval estimate of the population mean,…

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Q: If n=400 and X=120​, construct a 90​% confidence interval estimate for the population proportion.…

A: Solution: Given information: n= 400 Sample size  X= 120 Success p^=Xn=120400=0.30 Sample proportion…

Q: (c) A 99% confidence interval from a sample size of 27 observations. 3.054

A: It is given that the sample size is 27 and the confidence level is 0.99.

Q: 14. Find the sample size that will produce the maximum error of a 99% confidence interval for a…

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Q: Find the critical value, for a 90% confidence when the sample size is 22

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Q: for a sample size of 12 and a 90% confidence interval, the t statistic used to estimate U would be.

A: Given: Sample size = 12 Confidence interval= 90%

Q: It is desired to draw a sample with a 95% confidence level and a 5% significance level from a…

A: The formula of finding a sample size(n) for a given population size and confidence interval is given…

Q: If you wish to estimate a population mean with a sampling distribution error SE = 0.21 using a 95%…

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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…