What proportion of fish are inedible because of chemical pollution downstream of a factory? Find the sample size required to estimate the proportion of inedible fish accurate to within 0.13 at the 98% confidence level

Q: How large a sample would be necessary to estimate the true proportion defective in a large…

A: Note: Please repost 5th question as i can author only 1 question as per my policy 4)

Q: Kam Air is considering launching flights to Frankfurt and wants to estimate the average number…

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Q: In a survey of 2224 adults in a recent​ year, 1280 say they have made a New​ Year's resolution.…

A: Obtain the 90% confidence interval for the population proportion. The 90% confidence interval for…

Q: find the sample size needed to estimate the percentage of democrats who have tattoos. Use a 0.05…

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Q: Identify the regions under the t-distribution corresponding to the t-value. 1. When sample size n is…

A: Given that : n=sample size= 15 So, degrees of freedom= 15 - 1 = 14 Confidence level = 95%= 0.95

Q: In a survey of 2208 adults in a recent​ year, 1438 say they have made a New​ Year's resolution.…

A: Construct 90% confidence interval for population proportion:The sample of 2,208 adults among that…

Q: Find the critical t value to use in making a 99% confidence interval for a mean if the sample size…

A: Solution-: Given: n=7,α=0.01 We find the critical t- value to use in making a 99% C.I. for a mean

Q: As part of an annual review of its account, a discount brokerage selects a random sample of 26…

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Q: In 60 mph crash tests of Mersadies Bends, the front bumpers were found to have been bent in by 8,…

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Q: In a random sample of eleven people, the mean driving distance to work was 25.9 miles and the…

A: Given data In a random sample of eleven people, the mean driving distance to work was 25.9 miles and…

Q: In a recent poll of 1100 randomly selected adult bicyclists, 26% said they regularly ride their…

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Q: Estimate the variability in such sample proportions by finding the standard error. Among 1815…

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Q: The quality-control manager of a chemical company randomly sampled twenty 100-pound bags of…

A: It is given that the sample variance is 6.62 and the sample size is 20.

Q: In a survey of 2405 adults in a recent​ year, 1217 say they have made a New Year's resolution.…

A: Given: n=2405 x=1217

Q: Find the critical t value to use in making a 98% confidence interval for a mean if the sample size…

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Q: In a survey of 2542 adults in a recent​ year, 1487 say they have made a New​ Year's resolution.…

A: Given,  n = 2542 x = 1487 proportion p  = 1487/2542                       = 0.5850

Q: To study the perceptions of waiting time, a researcher conducted a survey of 100 prospective…

A: The provided information  x¯=5.2σ=1.2n=100α=0.10The critical value is zc=1.64  (from statistical…

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

A: Solution: From the given information, confidence level is 0.95, p=0.40 and E=0.03.

Q: How large a sample is necessary to estimate the true proportion of unmarried Canadians aged 25-29…

A: Given data: Margin of error  = 5% = 0.05 Confidence level  = 0.90 To find: Sample size (n) = ?

Q: In a survey of 2407 adults in a recent​ year,1468 say they have made a New​ Year's resolution.…

A: Given that,  Sample size, n= 2407 And X= 1468 We know that proportion, p=X/n So p= 1468/2407 p=…

Q: What sample size is required to generate a 90% confidence interval for the mean annual real estate…

A: The lower limit and upper limit of confidence interval for mean is x¯-z*σn and x¯+z*σn,…

Q: Is there evidence to show that there is a difference in the mean overall distance of brands? Use a =…

A: Our aim is to answer the following:  a) Is there evidence to show that there is a difference in the…

Q: Is sea level the same along all coastal regions? To examine this sample of 12 coastal locations in…

A: Note: “Since you have posted a question with many sub-parts, we will solve three sub-parts for you.…

Q: Assume the conditions for inference have been met. The park ranger uses the sample data to construct…

A: Hello. Since you have posted multiple questions and not specified which question needs to be solved,…

Q: For a test market find the sample size needed to estimate the true proportions if consumers…

A: Obtain the sample size of a no preliminary estimate for p. The formula of sample size is, Use EXCEL…

Q: If no previous study has been done, give the sample size we should use to find p with a margin of…

A: Given that, Critical value: Using the z-table, the critical value at 90% confidence level for two…

Q: A survey was conducted to 5,000 Senior high school students to find out, who are in favor with…

A: The sample size is given by: n=z2p1-pE2 Where n is the sample size, z is the z score of the given…

Q: What sample sizes are necessary to cover the whole region in which you live? Again use a confidence…

A: Sample size can be calculated by using marginal error, confidence level, and standard deviation. But…

Q: Determine the sample size needed to construct a 96% confidence interval to estimate the average…

A: Given  The confidence level     =   96% Margin error                 =   $100 Standard deviation…

Q: What is the critical value zalpha/2 that corresponds to 86% confidence level?

A: Here given  Confidence level = 86% So alpha = 1 - 0.86 = 0.14

Q: From a random sample of 1000 Americans, it was discovered that 920 of them lived in neighborhoods…

A: Given: n=1000x=920 The point estimate for the proportion of Americas who live in neighborhoods with…

Q: In order to determine the summer unemployment rate among college students, a pilot sample was taken…

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Q: Explain how to identify the minimum sample size needed to construct a confidence interval for the…

A: Sample size for proportion is given by

Q: b) Calculate the sample standard deviation c) Using the p value approach at the 1% level of…

A: Given: ∑x=205∑x-x¯2=56.43n=50α=0.01Thus,x¯=20550=4.1 Part b: The sample standard deviation is…

Q: From a random sample of 1000 Americans, it was discovered that 920 of them lived in neighborhoods…

A: The following information has been given: The sample size is n=1000. The favorable cases are x=920.

Q: In a survey of 2497 adults in a recent​ year, 1383 say they have made a New​ Year's resolution.…

A: The sample size (n) is 2497 and the value of x is 1383.

Q: In a survey of 2554 adults in a recent​ year, 1357 say they have made a New​ Year's resolution.…

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Q: Compute for the appropriate sample size if the margin of error is 16, with a sample standard…

A: GivenMargin of error(E)=16standard deviation(σ)=49confidence level=85%

Q: Based on this, what is the margin of error associated with a 95% confidence interval for the true…

A: Given : n=36 , X-bar=35  , σ=2.3  , α=0.05 Since , the population standard deviation (σ) is known.…

Q: A survey conducted by the U.S. department of Labor found the 48 out of 500 heads of households were…

A: Given that, n = 500 x = 48 90% confidence interval

Q: What is the standard confidence limit to determine if a sample should be included in a population?

A: Confidence limit is defined as the values at the upper and lower end of a confidence interval.

Q: With 80% confidence, for sample proportion. 46 and sample size 26, what is the upper confidence…

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Q: 2. What should the sample size be for an interval around the mean, with precision +0.1, to have…

A: Given data ; Margin of error = 0.1 Confidence level = 95% To calculate the required sample size.

Q: What is the critical value needed to compute the margin of error for a confidence interval for μ…

A: Given: Confidence level = 95% = 0.95 Significance level α = 1-0.95 α = 0.05

Q: In a survey of 2101 adults in a recent​ year, 1366 say they have made a New​ Year's…

A: Obtain the 90% confidence interval for the population proportion. The 90% confidence interval for…

Q: Determine the most conservative sample size for 95% confidence interval estimar of the population…

A: Given data, E=0.04 z-value at 95% confidence is Zc=1.96 Let proportion be p=0.50 n=?

Q: . What sample size would be required to estimate the proportion of all hospital referrals to the…

A: Sample Size: The formula for the sample size is as follows: Here, zα/2 is the critical value at 95%…

Q: 17 walleyes from Lake Erie were sampled and found to have a mean weight of 2.4 pounds with astandard…

A: Here, the sample size is less than 30 and the population standard deviation is unknown. it is…

Q: A 92% confidence interval for the mean number of cucumbers a plant produces per season was…

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Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.