You are going to construct a 99% confidence interval for the proportion of hip replacement recipients who require follow up physical or occupational therapy. You want the margin of error to be .045. Your initial guess is that 72% of the population requires follow up physical or occupational therapy. What should the sample size be to achieve this margin of error?

Q: A poll reported that 67.7% of adults in a certain country believe that organic produce is better for…

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Q: You work for NASA and are interested in determining the population proportion, with 99% confidence,…

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Q: Construct an interval estimate for the given parameter using the given sample statistic and margin…

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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: Believe it or not, there are some people who dont think that Duke will win the NCAA tournament this…

A: Obtain the 90% Confidence Interval for the IQ of DDs.   The 90% Confidence Interval for the IQ of…

Q: find the margin of error for a sample mean, given n=16, s=4, Xbar=17. for a 95% confidence interval.

A: The margin of error for sample mean is given by,

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

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Q: An epidemiologist is worried about the prevalence of the flu in East Vancouver and the potential…

A: The random variable flu follows binomial distribution. X ~ B (n, p). The sample size is 337. The…

Q: You plan to conduct a survey to find what proportion of the workforce has two or more jobs. You…

A: Sample Size: The formula for the sample size is as follows: Here, zα/2 is the critical value at 97%…

Q: You plan to construct a 90% confidence interval for the proportion of all middle school students who…

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Q: A survey asked, "How important is it to you to buy products that are made in America?" Of the 600…

A: Given x=450 n=600

Q: m what their favorite color was. 23 people said their favorite color is blue. Using this sample,…

A: Sample proportion is the fraction of successful samples and total number of samples. Here,  Total…

Q: A survey of 26 individuals found that they spent an average of $39.21 on exercise attire for the…

A: Confidence interval is an inference process which is used to estimate the population parameter. The…

Q: Suppose you want to construct a confidence interval with a margin of error of 0.03 (3%). Find the…

A: The formula for calculating sample size is, n = z2*p^(1-p^)MOE2 Where, z is the z score (default…

Q: Exercise 2 Problem 12 12 Information. You are given the data in the table on the right 21 19…

A: Solution Here is two different questions I am solving exercise 2

Q: Suppose that we wanted to estimate the true average number of eggs a queen bee lays with 95%…

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Q: You plan to conduct a survey to find out the proportion of students who enjoy taking classes…

A: Given  The margin of error is given as m=0.02 At a 90% confidence interval, α=0.1 As the proportion…

Q: Past surveys reveal that 30% of tourists going to Macau to gamble spend more than $1,000. The…

A: The 100(1-α)% confidence interval for a population proportion P is given by…

Q: want to estimate the proportion of all college students who traveled during spring break. survey a…

A: Given that Sample size n =200 Favorable cases x =116 Sample proportion p^=x/n =116/200 =0.58

Q: You plan to conduct a survey to find what the proportion of the workforce has two or more jobs. You…

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Q: A researcher wants to make a ninety-five percent confidence interval for the population mean. She…

A: From the given information,Margin of error , E = 0.56 Population variance, 7.6 Using formula ,

Q: The Statistics Games are played by a large number of teams across the county. Teams raise money to…

A: We have given that,  Sample mean (x̄) = $ 375, standard deviation (s) = $ 32 and sample size (n) =…

Q: You are trying to calculate a confidence interval to estimate a population mean. After performing…

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Q: A sample of 700 from population A has a proportion of interest of 0.24 while a sample of 600 from…

A: Confidence Interval: The form of the confidence interval is, CI = Point estimate ± Margin of error…

Q: Refer to the following scenario. An epidemiologist is worried about the prevalence of the flu in…

A: The formula of sample size is, Use EXCEL Procedure for finding the critical value of z.   Follow…

Q: Javier wants to estimate the percentage of people who have purchased a used car. He surveys 250…

A: From the provided information, Sample size (n) = 250 From which 212 have purchased a used car.…

Q: You are trying to estimate the percent of people in California who have a college degree. You…

A: According to the given information in this question We need to identify that from the given…

Q: It is believed that slightly over 50% of Americans own pets. A 95% confidence interval for the…

A: Confidence Interval: The form of the confidence interval is, CI = Point estimate ± Margin of error…

Q: Suppose you calculate a 95% confidence interval for a proportion to to be: 0.39 to 0.78. Determine…

A: Given,   Lower bound = 0.39​ Upper bound = 0.78   Here, we use to determine the margin of error.

Q: A student organization conducted a statistical study to calculate a 95% confidence interval for the…

A: Hence,

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 0.99 and E=0.05.

Q: What is the confidence interval? Select the correct choice below and, if necessary, fill in the…

A: Mean = 56.64 Standard deviation = 14.598 n=100

Q: A news article that you read stated that 58% of voters prefer the Democratic candidate. You think…

A: The following information is provided: The sample size is N=300N = 300, the number of favorable…

Q: Your professor wishes to estimate the proportion of ALL high school students enrolled in…

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Q: Your state is considering raising the legal age for consumption of alcoholic beverages to 21 years…

A: p = 0.5 Margin of error = 0.01

Q: Cora wants to determine a 90% confidence interval for the true proportion of high school students in…

A: Confidence level=90%Margin of error(E)=0.02Assuming that we have no prior estimate of the proportion…

Q: You want to estimate the proportion of current OSU students who were born outside of Ohio. You…

A: Given: n= 300 At 99.0 % confidence level , z score= 2.576 Need to find MARGIN OF ERROR for…