If we want a 95% confidence interval for proportion within 3% how large a sample do we need?

Q: If n = 340 and p^=0.92, find the margin of error at a 90% confidence level E= Give your answer to…

A: Given,n=340p^=0.921-p^=1-0.92=0.08α=1-0.90=0.1α2=0.05Z0.05=1.645

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

A: Given,x=100n=400sample…

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: When constructing a confidence interval, if we construct a confidence interval with a 95% confidence…

A: The general formula for the width of the confidence interval is,

Q: In a survey, the planning value for the population proportion is p*=0.25 . How large a sample should…

A: Sample size: The sample size for a desired confidence level, α with a given margin of error, E is…

Q: We wish to know the 95% confidence interval for the population proportion of people who believe that…

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

A: Solution: It is given that the planning value for the population proportion is 0.25. The confidence…

Q: If n = 220,p = 0.4,then what will be the 87.4% confidence interval for the population proportion?

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Q: Dylan wants to determine a 95% confidence interval for the true proportion of high school students…

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Q: Suppose we want to estimate the proportion of teenagers (aged 13-18) who are lactose intolerant. If…

A: Given information Error = 2% = 0.02 Confidence level = 0.95

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

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Q: Suppose we want to estimate the proportion of teenagers (aged 13-18) who are lactose intolerant. If…

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Q: using the confidence interval method, to test that population mean equals 14, a researcher obtains…

A: Solution: State the hypotheses. Null hypothesis: H0: µ=14. That is, the population mean is equal to…

Q: In a survey, the planning value for the population proportion is p* =0.25 . How large a sample…

A: Given: p* = 0.25α=0.05MOE=0.09

Q: Suppose you want to construct a 95% confidence interval for the proportion of people who will stop…

A: We have given that,  Margin of error (E) = ± 4% = ±0.04 and confidence interval = 95% Then,  We will…

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: Suppose we want to estimate the proportion of teenagers (aged 13-18) who are lactose intolerant. If…

A: According to the provided information, The z score at 95% confidence interval from the standard…

Q: How large is the sample if the confidence level is 97%, Ɛ = 2.5%  and ρ = .35?

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Q: In a survey, the planning value for the population proportion is p* = 0.25. How large a sample…

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Q: The 90% confidence interval for the population proportion p is (,) The 95% confidence interval for…

A: here n = 634 p^ = proportion of males gone to dentist pin past year = 390634 = 0.6151 z-critical for…

Q: the sample proportion of females is  x=118  n=164 P = .720  #1 Make a 95% confidence interval for…

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Q: In the Laboratory Activity, we used 90% confidence interval instead of 100%, why is this so? Why not…

A: Confidence Interval A confidence interval (CI) is a set of numbers that assess the validity of the…

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: If the alpha level is .05, then the confidence level is ?

A: Given: alpha = 0.05 confidence level / significant level = 1 - alpha

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

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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: If n = 440 and X = 352, construct a 90% confidence interval for the population proportion, p. Give…

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Q: In the previous example, you learned that the 95% confidence interval for the true proportion of all…

A: Calculate the point estimate and margin of error used to create this confidence interval.

Q: When finding confidence intervals for one population mean, if you want a 95% confidence interval,…

A: A critical value is the number on the borderline separating sample statistics that are likely to…

Q: You find a confidence interval on proportion to be: 45.1% < p < 50.9% What is p? What is the…

A: Given confidence interval is  45.1% &lt; p &lt; 50.9% p=? Margin of error (E)=?

Q: The 2010 General Social Survey reported a sample where about 48% of US residents thought marijuana…

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Q: A confidence interval for a population proportion p is 0.635 to 0.700. What is the margin of error?

A: We have given that confidence interval for a population proportion p is 0.635 to 0.700.

Q: If the sample mean is 70 and the standard error of the sample mean is 8, what will be the 90%…

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Q: which sample size of students would have a confidence interval with a smaller width?

A: Answer- ● A sample size of 500 students. Will have a confidence interval with a smaller width.

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: In a survey, the planning value for the population proportion is p* = 0.25. How large a sample…

A: Given : Population proportion (p*) = 0.25 Confidence level = 95% So ; significance level (α) =…

Q: In a survey of 1037 US adults ages 65 and over, 643 were concerned about getting the flu. A 99%…

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Q: If you obtained one thousand 95% confidence intervals for a population mean, μ, roughly how many of…

A: A 95% confidence interval means that if we take 100 different samples and determine a 95% confidence…

Q: A random sample of 500 observations yields x̅ =400 and s=50. What is the  95% confidence interval…

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Q: Suppose we know that a confidence interval for a population proportion is (0.105,0.355), with a…

A: Obtain the margin of error. The margin of error is obtained below: Margin of Error: The margin of…

Q: If n = 550 and X = 440, construct a 90% confidence interval for the population proportion, p. Give…

A: Given information:Total number of trials (n) = 550Number of success (X) = 440Confidence level = 0.90

Q: Which is true about a 95% confidence interval for a population proportion based on a given sample? A…

A: The given information about the 95% confidence interval for a population proportion.

Q: What conditions need to be met in order to use the Z value in the formula for the confidence…

A: Here we need to find the condition which needs to be satisfied inorder to use the z value in…

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: If a 95% confidence interval is reported as (30, 100) for the average time spent (hours) in online-…

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Q: For what type of variable does it make sense to construct a confidence interval about a population…

A: In this case, we need to find the correct option for the given question.

Q: For a fixed sample size, what happens to a confidence interval for u when we increase the level of…

A: Here we need to determine whether the width of the confidence interval becomes narrower or wider…

Q: How Much More Effective Is It to Test Yourself in Studying? We have found that students who study by…

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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.