Identify the value of the margin of error E C. Construct the confidence interval There are 3 part to this question. Other two questions are above.

Q: we have a 95% confidence interval for some parameter. If we were to increase the confidence , say to…

A: If increases the confidence level then what happened in width of C.I.

Q: A doctor would like to estimate the mean difference in height of pairs of identical twins. The…

A: The correct inference regarding the given interval of (-0.823, 0.573) is to be made from the given…

Q: The weights of college football players are normally distributed with a mean of 200 pounds and a…

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Q: The student government association at a university wants to estimate the percentage of the student…

A: As per guideline expert have to answer first question only.

Q: Use the given confidence interval to find the margin of error and the sample mean. (14.6,21.2) The…

A: Answer - Given confidence interval  ( 14.6, 21.2)                Find the margin of error and the…

Q: Suppose we wanted to estimate the average amount of sleep (in hours) a college student gets a night.…

A: Confidence interval : Confidence interval is a range of values it contains the true population…

Q: A  95% confidence interval for the  proportion of voters who say "they want change" is computed and…

A: From the provided information, Confidence level = 95% Confidence interval for the proportion is…

Q: How to find the bounds of the confidence interval. The data is…

A: The sums are, x y x2 xy 25 16.9 625 422.5 27.75 17.6 770.0625 488.4 26.75 17.3 715.5625…

Q: A sociologist wants to construct a 94% confidence interval for the proportion of teenagers who uses…

A: Given, p=0.23 E=0.02 z value at 94% confidence is Zc=1.88 n=?

Q: A random sample of 230 people living in Seattle found that 83 of them had a pet. A random sample of…

A: Solution: Given information: n1= 230 Sample size of people iving in Seattle n2= 172  Sample size of…

Q: A  95% confidence interval for the  proportion of voters who say "they want change" is computed and…

A: For the population proportion, the confidence interval can be computed using the formulae: C.I=p⏞±E…

Q: A person surveyed his Youtube chat and asked how many pages of manga of Demon Slayer they have seen.…

A: The mean number of episodes was 304 episodes. The confidence interval for the population mean is,…

Q: mith thinks that on average his shop earns $500 a day, he wants to know if he is correct or not. He…

A: Confidence interval: It is defined as the range which contains the value of true population…

Q: truct the 80% confidence interval for the difference p₁-P2 when x₁ = 40, n₁ = 80, x₂=20, and n₂ =…

A: For population 1:The number of successes is .The sample size is .For population 2:The number of…

Q: Find the 95% confidence interval for the proportion of customers planning to buy the shoes, and…

A: Provided data is, Mary was successful and collected 600 responses in time. 195 of the surveyed…

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: What is the proper interpretation of a confidence interval for the difference in two proportions…

A: The confidence interval for the difference in the two proportions that has a negative number and a…

Q: Suppose we wish to decrease the width of the confidence interval for µ. What are two ways in which…

A: The c% confidence interval for population mean will signify that with c% confidence the population…

Q: To construct a confidence interval, we have to make three assumptions. explain what are those…

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Q: Goofy Marketing Solutions conducted a survey among 16 randomly selected visitors to the newly opened…

A: The random variable satisfaction score follows normal distribution. We have to construct 95%…

Q: Suppose that a health expert has claimed that 28% of college students smoke cigarettes. To…

A: Given 95% confidence interval for the percentage of college students who smoke is 19% to 24%. Given…

Q: A researcher wants to estimate the actual proportion of citizens of a certain country who feel that…

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Q: In Italy, Totti has four restaurants in the capital Roma. The manager is concerned that there is a…

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Q: A drug is used to help prevent blood clots in certain patients. In clinical trials, among 4918…

A: The number of patients who suffered adverse reactions is 163 in the sample of 4918 patients.…

Q: If n=120 and p (p-hat) =0.31, find the margin of error at a 99% confidence level Give your answer to…

A: Sample size, n = 120 p^ = 0.31 99% confidence level

Q: Two different simple random samples are drawn from two different populations. The first sample…

A: Given: Sample size of first is n1=20. Number of people have same attribute is x1=9. Estimated sample…

Q: The student government association at a university wants to estimate the percentage of the student…

A: Given: Margin of error = 4% = 0.04 Z for 95% confidence level = 1.96

Q: A firm randomly samples 100 workers at its New York plant and finds that 32% of the workers say that…

A: The proportion of workers who say that they buy the firm’s product is 0.32.

Q: Out of 400 people sampled, 288 had kids. Based on this, construct a 99% confidence interval for the…

A: In statistical inference, there are two types of estimation,  1) Point estimation and 2) Interval…

Q: You are interested in constructing a 99% confidence interval for the proportion of all caterpllal…

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Q: If n 600 and p (p-hat) = 0.95, construct a 95% confidence interval. !! Give your answers to three…

A: we have given that  n=600   , and  sample proportion (p^) = 0.95

Q: We wish to estimate what percent of adult residents in a certain county are parents. Out of 100…

A: Solution a)  0.156<p<0.324 b)  p=0.240±0.084

Q: A group of researchers is interested in middle school students and their willingness to appear to…

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Q: If n=510 and p (p-hat) =0.47, find the margin of error at a 90% confidence level Give your answer as…

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Q: The National Center for Education Statistics reported that 47% of college students work to pay for…

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Q: Use the given confidence interval to find the margin of error and the sample mean. (15.3,24.1) The…

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Q: Find the value of the sample size needed to if the confidence interval is 95% that the sample…

A: GIVEN:  sample proportion p=0.650 Margine of error =0.02  To find sample size n such that confidence…

Q: An actuary is interested in estimating the proportion of young adults who plan to have children…

A: We need to construct the 99% confidence interval for the population proportion. We have been…

Q: Determine the point estimate of the population mean and margin of error for the confidence interval.…

A: The objective is to estimate the population mean and margin of error. Given that the lower bound is…

Q: The values in the middle of a confidence interval are more likely to be the true value for the…

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Q: List below are the speeds (mi/h) measured from the southbound traffic on I-280, the speed limit is…

A: Given data is62,61,61,57,61,54,59,58,59,69,60,67

Q: The mileage a car got on 5 trips from Greenwood to Greenville was used to create a 90% confidence…

A: Solution Given that 90% confidence interval is​ (32.32, 38.32).

Q: Use the given confidence interval to find the margin of error and the sample mean.   ​(15.7 ​,22.5…

A: Given : Confidence interval (C.I)=(15.7 , 22.5)