It is said that happy and healthy workers are efficient and productive. A company that manufactures exercising machines wanted to know the percentage of large companies that provide on-site health club facilities. A sample of 240 such companies showed that 103 of them provide such facilities on site. Construct a 95% confidence interval for the percentage of all such companies that provide such facilities on site. What is the margin of error for this estimate? Round your answers to one decimal place. Confidence interval: Margin of error:

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A: The claim is that 44% of parents who had children in grades K-12 were satisfied with the quality of…

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A: Given information, In a study, a volunteer wear a caveman mask scolded by 158 out of 444 crows he…

Q: Several years ago, 36% of parents who had children in grades K-12 were satisfied with the quality of…

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A: From the above given data the following solution is provided below:

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A: Introduction: The 100 (1 – α) % confidence interval for the population proportion, p is: Here, n is…

Q: The 95% confidence interval generally is: Select one: a. none of these. b. wider than the 99%…

A: Confidence level -95%   Higher the confidence level, higher the width of the confidence interval.

Q: Kim wants to determine a 80 percent confidence interval for the true proportion of high school…

A: Given: Margin of error, E=0.04 Confidence level=80%

Q: 88% of California adults (444 out of 506 surveyed) feel that education is one of the top issues…

A: The value of z at a 90% confidence level is 1.645, which can be obtained by using the standard…

Q: For a sample of 120 businesses, the average profit they generate in a month is $54,000 with a…

A: We have given that,  Average or sample mean (x̄) = 54000, standard deviation (s) = 8800 and sample…

Q: It is said that happy and healthy workers are efficient and productive. A company that manufactures…

A: Given information

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A: From the provided information Sample size (n) = 29, People who recommend x = 9 The sample proportion…

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

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A: We have to construct ci.

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A:

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: cording to a report in USAToday, more and more parents are helping ndom sample of 40 young adults…

A: The formula to construct confidence interval is, p^±Zα/2*p^(1-p^)n The formula for margin of error…

Q: A telephone poll of 1,000 adult Americans was reported in an issue of a news magazine. One of the…

A: A telephone poll of 1,000 adult Americans was reported in an issue of a news magazine. One of the…

Q: Franchise Profits. According to Franchise Business Review, over 50% of all food franchises earn a…

A: Given: Population size, n=142 Sample size, x=81 (1) Point estimate of the proportion of casual…

Q: A &B

A: The provided data mentions the value of sample size, n is 928 and the value of x is 128. The…

Q: one with a 95% confidence level and the other with a 99.7% confidence level. Which interval is…

A: Confidence interval is probability, which refers that population parameter will fall within set of…

Q: What management interpretation would you give for a 95% confidence interval calculated for the mean?…

A: The confidence interval is the measure with with we try to get the interval on the population…

Q: A SURVEY WAS CONDUCTED IN 2010 AND 2020. THE 2010 RESULTS SUMMARIZED THE RESPONSI WHEREAS THE…

A: The given table is HEALTH ISSUE 2010 SURVEY 2020 SURVEY ATE RECOMMEND AMOUNT OF FIBROUS…

Q: Several years ago, 50% of parents who had children in grades K-12 were satisfied with the quality of…

A:

Q: An environmentalist wants to find out the fraction of oil tankers that have spills each month.…

A:

Q: The branch manager of an outlet store​ (Store 1) of a nationwide chain of pet supply stores wants to…

A: Comment: As per the our company guidelines we are supposed to answer only three subparts. Kindly…

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: Several years ago, 44% of parents who had children in grades K-12 were satisfied with the quality of…

A: We have given that 44% of parents who had children in grades K-12 were satisfied with the quality of…

Q: 3.1 Construct a 95% confidence interval for the proportion of South Africans who avoided fat in…

A: From given data we have : for 2010 survey sample size=n1=1250 Proportion (Avoided fat)=p^1=0.55 for…

Q: Examining a random sample of records from my past Statistics classes, I found the 47 of the 282…

A:

Q: A SURVEY WAS CONDUCTED IN 2010 AND 2020. THE 2010 RESULTS SUMMARIZED THE RESPONSES OF 1250…

A: Confidence interval are used to measure the range where the population proportion lies. It is…

Q: Call me: A sociologist wants to construct a 95% confidence interval for the proportion of children…

A: population proportion(p)=0.29Margin of error(E)=0.02confidence level=95%

Q: An insurance company collects data on seat-belt use among drivers in a country. 90% confidence…

A: Givenn1=2000p1^=28%=0.28P2^=xn2=4821500=0.32α=1-0.90=0.10α2=0.05zc=zα2=z0.05=1.6449      (from z…

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: wenty years ago, a very famous psychologist specializing in marriage counseling authored a book…

A: Solution: Given information n= 275 Sample size of couples who bought book. X= 217  stayed together…

Q: A 95% confidence interval is narrower than a 90% confidence interval for the same data set. O True O…

A: We have to find given probability.

Q: Several years ago, 50% of parents who had children in grades K-12 were satisfied with the quality of…

A: Given Data Sample Size, n = 1105 Number of successes, x = 491.0 confidence…

Q: Many medical professionals believe that smoking increases the risk of heart disease and cancer. A…

A: From the given information, it is obtained that: σ (population standard deviation)=12Confidence…

Q: It is said that happy and healthy workers are efficient and productive. A company that manufactures…

A: The random variable facilities on site follow binomial distribution. X ~ B (n, p) We have to…

Q: registered. Construct a 90% confidence interval for the proportion of first-time visitors who saw…

A: Let p be the population proportion of first-time visitors who saw the new design that registered.…

Q: Several years​ ago, 42​% of parents who had children in grades​ K-12 were satisfied with the quality…

A: Let p be the population proportion of parents satisfied with the quality of education the students…

Q: It is said that happy and healthy workers are efficient and productive. A company that manufactures…

A: The given information is that the sample of 240 companies showed that 97 of them provide facilities…

Q: Keisha wants to estimate the percentage of managers at her company that hold an MBA. She surveys 320…

A: Givensample size(n)=320x=72sample proportion(p^)=xn=72320=0.225confidence level=90%

Q: Several years ago, 43% of parents who had children in grades K-12 were satisfied with the quality of…

A:

Q: several years ago, 48% of parents who had children in grades K-12 were satisfied with the quality of…

A: Given that  Sample size n =1035 Favorable cases x =497 Sample proportion p^=x/n  =497/1035 =0.4802

Q: Several years ago, 50% of parents who had children in grades K-12 were satisfied with the quality of…

A: Solution

Q: A soft drink company surveys 500 shoppers and finds that 61% of shoppers prefer diet soda to regular…

A: