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:

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

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

Q: A volunteer wearing a caveman mask was scolded by 158 out of 444 crows he encountered, and the crows…

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…

A:

Q: John wanted to know the percentage of Plug-in Hybrid Elective Vehicle (or PHEV) on the road in the…

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

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

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

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

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

A:

Q: In a survey, 13 people were asked how much they spent on their child's last birthday gift. The…

A: We have to construct ci.

Q: Out of all the students that attend Yale University, 1,982 were selected to participate in a school…

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

A:

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: 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: 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: