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 random sample of 240 such companies showed that 96 of them provide such facilities on site. a. What is the point estimate of the percentage of all such companies that provide such facilities on site?b. Construct a 97% confidence interval for the percentage of all such companies that provide such facilities on site. What is the margin of error for the estimate?

Q: In a survey of 3239 adults aged 57 through 85 years, it was found that 85.8% of them used at least…

A: Given : n=3239 p^=85.8%=0.858The formula for confidence interval for population proportion is…

Q: 2. Out of a sample of 760 people, 367 own their homes.. Construct a 95% confidence interval for the…

A:

Q: In a survey of 3005 adults aged 57 through 85 years, it was found that 81.7% of them used at least…

A: Given :  n = 3005 p̂=0.817

Q: Listed below are the amounts of net worth (in millions of dollars) of the ten wealthiest celebrities…

A:

Q: The U.S. Department of Health, Education, and Welfare collected sample data for 1555 women aged 18…

A: given data,n=1555DF=n-1=1555-1=1554x¯=193.7σ=42.0CI=0.97α=1-0.97=0.03E=?

Q: A smart phone manufacturer wants to find out what proportion of its customers are dissatisfied with…

A: Given that - A smart phone manufacturer wants to find out what proportion of its customers are…

Q: a survey of 3088 adults aged 57 through 85​ years, it was found that 87.1​% of them used at least…

A: The formula for computing confidence interval is,  n is the sample size and P is the proportion.

Q: n Kleman is the host of KXYZ Radio 55 AM drive-time news in Denver. During his morning program, John…

A: Given: Data: 3.0,3.5,4.0,4.5,3.0 The five callers reported that their children watched the following…

Q: In a survey of 3422 adults aged 57 through 85​ years, it was found that 82.7​% of them used at least…

A:

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: n a survey of 500 students, 180 students said that they prefer classes on Mondays and Wednesdays…

A:

Q: . How many of the 3335 subjects used at least one prescription​ medication? b. Construct a​ 90%…

A: n = 3335 p = 0.804

Q: In a survey of 3110 adults aged 57 through 85 years, it was found that 87.9% of them used at least…

A:

Q: Listed below are the amounts of net worth (in millions of dollars) of the ten wealthiest celebrities…

A: Hey there! Thank you for posting the question. Since there are multiple questions posted, we will…

Q: 829 adult were surveyed in one city, and 51% of them are opposed to the use of the photo-cop for…

A: Given data: n = 829 p = 0.51

Q: . The following information is from the article College Students' Attitudes Toward UFOs, (College…

A: given data x = 10n = 18090% confidence interval for p.

Q: In a survey of 3015 adults aged 57 through 85 years, it was found that 85.6% of them used at least…

A:

Q: An apartment hunter is shopping for either a one-bedroom or two-bedroom apartment in different…

A: Here the new variable is  X= difference  = (Two bed- One bed)  Then mean = ΣXi/n X̄ = (200 + 290 +…

Q: In a survey of 3115 adults aged 57 through 85​ years, it was found that 86.1​% of them used at…

A:

Q: A Gallup Youth Survey in 2001 found that of 501 randomly selected teenagers in the U.S., 271 of them…

A: Given Total number of teenagers selected = 501Number of teenagers said who get along with their…

Q: 4. Find a 99% confidence interval for the true proportion of cars that have V-shaped engines. Draw…

A: Given information: Consider the data that shows the Cars which have V-shaped engines. Car…

Q: n a survey of 3159 adults aged 57 through 85​ years, it was found that 86.2​% of them used at least…

A: Given: n = 3159 p =86.2​% = 0.862 The number of subjects used at least one prescription​ medication…

Q: An agent for a real estate company in a suburb has the business objective of developing more…

A: Given data of the apartment size rents and the rents are size (sq feet) rent ($) 530 1114…

Q: 1. Construct a 95% confidence interval to estimate the proportion of Wingate male students that are…

A: total number of male students =126 number of students who are left handed=17

Q: A genetic experiment with peas resulted in one sample of offspring that consisted of 443 green peas…

A: Find z-critical value:…

Q: The US Treasury found that a random sample of 1309 $20 bills found that 837 of them had trace…

A:

Q: In a survey of 3473 adults aged 57 through 85​ years, it was found that 84.6% of them used at least…

A:

Q: A genetic experiment with peas resulted in one sample of offspring that consisted of 443 green peas…

A: a) It is given that the number of yellow peas (x) is 156 and the green peas is 443. Therefore, the…

Q: Listed below are the ages of actresses and actors matched at the time that they won Oscars by year.…

A: Given: n1 = 10 n2 = 10 Formula Used: Confidence Interval = X1-X2±t*S1n1+1n2 S =…

Q: na survey of 2,300 website users, 1,861 cited "seeing photos or videos" as a major reason why they…

A: Given sample size(n)=2300 confidence interval=95%

Q: A food safety guideline is that the mercury in fish should be below 1 part per million (ppm). Listed…

A: Given, Sample size = 7   Since the population standard deviation is not known, use t-distribution to…

Q: Five fourth-grade children were selected at random from the entire class and timed in a short race.…

A: Given data : The times in seconds were 6.3, 4.2, 4.7, 6.0, and 5.7

Q: Several drugs are used to treat diabetes. A sales specialist for a leading pharmaceutical company…

A:

Q: . The following information is from the article College Students' Attitudes Toward UFOs, (College…

A: Here, level of confidence is 90% (or 0.90), n = 180 and x = 10. The significance level is, α=1-CL…

Q: 3469 adults aged 57 through 85​ years, it was found that 85.6​% of them used at least one…

A: It is given that sample size (n) is 3,469 and p hat value is 0.856.

Q: A country's education department reported that in 2015, 61.7% of students enrolled in college or a…

A: The question is about confidence interval.Given :Randomly selected individuals who graduated from…

Q: In a survey of 3293 adults aged 57 through 85​ years, it was found that 80.8​% of them used at least…

A: Given Information Total adults(n) = 3293

Q: Construct a 95% confidence interval to estimate the proportion of Wingate male st handed. From…

A: Sample size n =126 Favorable cases x =17 Sample proportion p^=x/n  =17/126 =0.1349 NOTE:- According…

Q: Listed below are the amounts of net worth​ (in millions of​ dollars) of the ten wealthiest…

A: Sample size(n)=10sample mean(x¯)=171standard deviation(s)=33.79020degrees of…

Types of Bias

Statistics is the study of data collection, organization, analysis, interpretation, and presentation. Statistical bias is a characteristic of a statistical technique or its findings in which the expected value deviates from the actual root quantitative parameter being estimated. According to the actual definition of bias, it refers to the tendency of a statistic to overestimate or underestimate a parameter.