A medical researcher wants to construct a 99% confidence interval for the proportion of knee replacement surgeries that result in complications.  A. An article in the journal of bone and joint surgery suggested that approximately 8% of such operations result in complications. Using this estimate what sample size is needed so that the confidence interval will have a margin of error of 4% ( use 0.04) B. Estimate the sample size if no estimate of p is available. please explain how to do this using a Ti84

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

A:

Q: A consumer agency wants to estimate the proportion of all drivers who wear seat belts while driving.…

A:

Q: Suppose the desired confidence level is fixed, then what is the effect of a larger sample size on…

A:

Q: A simple random sample of 400 individuals provides 100 Yes responses. a. What is the point estimate…

A: Given information x = 100 Sample size (n) = 400

Q: A company wants to estimate, at a 95% confidence level, the proportion of all families who own its…

A:

Q: An environmental science teacher at a high school with a large population of students wanted to…

A: The 95% confidence interval for the proportion of all students at the school who would respond yes…

Q: The amounts (in ounces) of juice in eight randomly selected juice bottles are: 15.4  15  15.4  15.7…

A: According to the given information in this question  We need to find margin of error

Q: A May 2000 Gallup poll found that 38% of a random sample of 1012 adults in the United States said…

A: (a)   Obtain the 96% confidence interval to estimate the true proportion of all U. S. adults who…

Q: For a research, let's consider the 10-unit sample with s = 32,866 as a preliminary example. For a…

A: Given data,s=32866E=10z-value at 95% confidence is Zc=1.96n=?

Q: The Pew Forum on Religion and Public Life reported on Dec. 9, 2009, that in a survey of 2003…

A:

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

A: If both the expected number of success and expected number of failures are greater or equal to 10,…

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

A: Given data isn=332x=36p^=xn=36332=0.108434Margin og error(E)=0.04Confidence level=95%

Q: The 2010 General Social Survey asked the question: “After an average work day, about how many hours…

A: a) There is 95% confidence that the proportion of number of hours spent relaxing or pursuing…

Q: It is believed that large doses of acetaminophen (the active ingredient in over the counter pain…

A: Given that  Margin of error =E =0.03 98% confidence interval.

Q: What is the impact on the confidence interval estimate if a larger sample is used?

A: Confidence interval:

Q: Explain why a 100% confidence interval for µ can never be constructed from a sample.  Hint:  What…

A:

Q: When the 2000 GSS asked subjects whether they would be willing to accept cuts in their standard of…

A: Hi! Thank you for posting the question. Since your question has more than three sub-parts, we have…

Q: The Pew Forum on Religion and Public Life reported on Dec. 9, 2009, that in a survey of 2003…

A: Given : Sample size(n)=2003sample proportion(p^)=0.25confidence level (c)=0.99α=1-c   =1-0.99…

Q: A simple random sample of 400 individuals provides 100 Yes responses. a. What is the point estimate…

A: It is given that a random survey, 100 responses (x) in “Yes” in a sample of 400 individuals (n).…

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

A: Proportion = p =40/334 = 0.119760479041916 Margin of Error = E = 0.04 Confidence Level = 95…

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

A:

Q: A local health center noted that in a sample of 400 patients, 80 were referred to them by the local…

A: From the provided information, Sample size (n) = 400 From which 80 were referred to them by the…

Q: A quality controller wants to estimate the proportion of high quaity goods out of a batch of…

A:

Q: (a) Why can't we use the large-sample confidence interval for the propor- tion p of patients…

A: Given p=proportion of people whose polyps reduced after drinking black rasberry powder for 9 months…

Q: If is a sample that is used to estimate a population proportion p. What is the 99% confidence…

A: Given  Sample size n=112 and proportion of success p= 0.598

Q: A website for car reviewssurveyeda random sample of 102car owners, and21wished they would have…

A: Here 102 car owners are surveyed and 21 wished that they would have bought a different model of the…

Q: If a sample is used to estimate a population proportion p. What is the 99% confidence interval for a…

A: Given data, n=138 x=62 sample proportion p=x/n =0.449 z-value at 99% confidence is zc=2.576

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

A: The known values are, The sample proportion is, Critical values: Using the z-table, the critical…

Q: The amounts (in ounces) of juice in eight randomly selected juice bottles are: 15.4  15  15.7  16…

A: Given data, 15.4,  15,  15.7,  16 , 15.4,  15.1 , 15.7,  15.3   From given data, sample mean is…

Q: In June 2020, a Gallup Poll asked U.S. adults whether immigration was a good thing or a bad thing…

A: Given X=600 n=1000

Q: What effect does increasing the sample size have on the width of a confidence interval? I know that…

A:

Q: We plan to sample parents in order to construct a 99% confidence interval for the proportion who…

A:

Q: A company wants to estimate, at a 95% confidence level, the proportion of all families who own its…

A:

Q: An environmental science teacher at a high school with a large population of students wanted to…

A: Given information: To obtain a potentially less biased estimate of the proportion, a statistics…

Q: Suppose data collected by observers at randomly selected intersections across the country revealed…

A: a) Given that there are 250 sample of drivers. Among 250 drivers, 50 were using their cell phone.…

Q: In a situation where the sample size was decreased from 39 to 29, what would be the impact on the…

A: The confidence interval depends on the three factors: Confidence level: The width of the…

Q: An environmental science teacher at a high school with a large population of students wanted to…

A: Question : (b) Given the method used by the environmental science teacher to collect the responses,…

Q: In a study of the accuracy of fast food drive-through orders, Restaurant A had 317 accurate orders…

A:

Q: Suppose that a safety group surveyed 1,200 drivers. Among those​ surveyed,78​% said that careless or…

A: Obtain the 99% confidence interval estimate for the true proportion in the population of all drivers…

Q: Suppose you are designing a survey of firework plans among Kansas residents. You would like for the…

A: Here we need to find the required sample size with a 95% confidence level to estimate the number of…

Q: Wisconsin Public Radio wants to duplicate a survey conducted in 2011 that found that 68% of adults…

A: From the provided information, Sample proportion (p̂) = 0.68 The z critical value at 90% confidence…

Q: The Centers for Disease Control reported the percentage of people 18 years of age andolder who smoke…

A:

Q: The Marist Poll published a report stating that 66% of adults nationally think licensed drivers…

A:

Q: A recent Gallup poll asked a random sample of 1010 Americans to respond to the statement, "If the…

A: Given,95% confidence interval for the proportion who would respond "Strongly agree" or "Agree" is…

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

A: The required sample size is calculated by using the formula:

Q: Victor conducted a similar survey among undergraduate students at the University of Michigan using a…

A: Margin of error for the population proportion is given by the formula: M.E=zα/2×p(1-p)n

Q: How large a sample should she take to achieve this? Please carry answers to at least six decimal…

A: Given: sample size, n=332 number of people have flu, x=36 Margin of error, E=0.03 confidence…

Q: According to a poll taken in a certain​ country, when adults were asked whether they were​ thriving,…

A: Sample size (n) = 439 240 of them said that they were struggling that is x = 240. The sample…

Q: An economist at the Florida Department of Labor and Employment needs to estimate the unemployment…

A: Givenp^=0.46sample size(n)=529

Q: A company wants to estimate, at a 95% confidence level, the proportion of all families who own its…

A: Given Data: p=0.5 ME=0.063   z-value corresponding to 95% Confidence level=1.96

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.