A survey found that 39 of 66 people who don't drink coffee often have trouble sleeping and 44 of 88 coffee drinkers often have trouble sleeping. Construct a 95% confidence interval to determine whether there is a difference between the proportion of noncoffee drinkers who have trouble sleeping and the proportion of coffee drinkers who have trouble sleeping.

Q: According to the February 2008 Federal Trade Commission report on consumer fraud and identity theft,…

A: Given n=1750 X=436

Q: In a survey of 2279 ​adults, 729 say they believe in UFOs. Construct a 90% confidence…

A:

Q: A recent study among 150 street hawkers in Cape Town showed that 48 of them are of the opinion that…

A: Given Data: n=150 x=48

Q: A survey of 540 depressed shoppers found at 32% of them shop on impulse. What is the 99% confidence…

A: Given : Sample Size, n = 540 confidence level,c=0.99 Significance level, α…

Q: In a survey of 1007 parents of children ages 8-14, 75% say they are willing to get a second or part…

A: The survey of 1007 parents of children 75% say they are willing to get a second or part time job…

Q: In August 2004, Time magazine, reporting on a survey of men’s attitudes, noted that “Young men are…

A: It is given that out of 129 surveyed 18-24 year old men, 80 said they were comfortable talking about…

Q: 3. A survey of 2,950 Filipinos showed that 2,655 trust the Supreme Court decisions on legal issues.…

A: Let X be the number of trust the supreme court decision on legal issues  n be the sample size  Given…

Q: In a survey of 2344 ​adults, 715 say they believe in

A: Given that there are 2344 adults and 715 say they believe in UFOs. Consider the sample proportion,…

Q: In a survey of 1,200 social media users, 56% said it is not okay to be friends with your boss.…

A:

Q: In a survey of 3234 adults aged 57 through 85​ years, it was found that 88.9% of them used at least…

A:

Q: In a recent survey of 200 households, 172 had central air conditioning.  Find the 85% confidence…

A: Given that In a recent survey of 200 households, 172 had central air conditioning That is…

Q: A Gallup poll of 1001 Americans age 18 and over conducted in May of 2013 found that 80% of the…

A: Solution: From the given information, p-hat=80% and the margin of error is 3.2%.

Q: If 64% of a sample of 550 people leaving a shopping mall claims to have spent over $25. b)…

A:

Q: In a survey of 1037 US adults ages 65 and over, 643 were concerned about getting the flu. A 99%…

A: Given,n=1037x=643p^=xnp^=6431037=0.6201-p^=1-0.620=0.380α=1-0.99=0.01α2=0.005Z0.005=2.58    (from…

Q: In a random sample, 136 of 400 people given a flu vaccine experienced some discomfort. Construct a…

A: Given information n = 400 People No of people given vaccine x = 136

Q: A Gallup poll of 1001 Americans age 18 and over conducted in May of 2013 found that 80% of the…

A: As given: Sample proportion: p=80%=0.8 Population size: N=1001 Confidence interval= 95% The z-value…

Q: In September 2011, Gallup surveyed 1,004 American adults and asked them whether they blamed Barack…

A: It is given that sample size (n) is 1004 and p-hat value is 0.53.

Q: The principal of a school claims that 30% of Grade 3 pupils stay in the playground after their…

A: We have given that  Population proportion p=30%=0.30 ,sample size n=500, and alpha =0.05 Sample…

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: In an October 2003 poll conducted by the Gallup organization, 684 of 1006 randomly selected adults…

A: The confidence interval for the proportion of adults 18 and older who think the government should…

Q: Of 91 adults selected randomly from one town, 60 have health insurance. Find a 90% confidence…

A: From the provided information, Sample size (n) = 91 Out of which 60 have health insurance. Sample…

Q: A recent study among 150 street hawkers in Cape Town showed that 48 of them are of the opinion that…

A: Givensample size(n)=150x=48p^=xn=48150p^=0.32confidence interval…

Q: In a poll of 2,500 likely voters, 966 say that the Philippines spend too little on education. Find…

A: Ans- Given the level of confidence interval   90 %                                        Then   α =…

Q: 95% confidence interval for the proportion of adults in the United States who say that their…

A:

Q: In a survey of 2298 ​adults, 709 say they believe in UFOs. Construct a 95% confidence interval for…

A:

Q: A recent survey found that 35 people out of a sample of 410 South Africans suffer from diabetes.…

A:

Q: Of 254 randomly selected medical students, 25 said that they planned to work in a rural community.…

A: It is given that, the number of students said that they planned to work in natural community   (x)…

Q: 2. In a survey of 1024 US adults, 287 said that their favorite sport to watch is football. a. Find a…

A: It is given that the survey contains 1024 US adults and the number of US adults who favorite sport…

Q: An internet service provider sampled 540 customers and found that 55 of them experienced an…

A:

Q: survey of an urban university showed that 750 of 1,100 students sampled attended a home football…

A:

Q: A marketing study by Ford Motor Company finds that 320 of the 650 buyers of compact cars were women.…

A: Let the population proportion of women who bought compact cars be P Given:         Sample size n =…

Q: wed that 122 involved uninsured drivers. Construct a 96% confidence interval for the proportion of…

A: A survey of 500 non-fatal accidents showed that 122 involved uninsured drivers. Let X be the number…

Q: A study was being done to estimate the proportion of students who receive financial aid. If the…

A:

Q: In a survey of 3116 adults aged 57 through 85​ years, it was found that 86.2​% of them used at least…

A:

Q: In a survey of 1024 US adults, 287 said that their favorite sport to watch is football. a. Find a…

A: From the provided information, Sample size (n) = 1024 Out of which 287 said that their favourite…

Q: n a recent Zogby International Poll, nine of 48 respondents rated the likelihood of a terrorist…

A: Given that : x = 9 n = 48

Q: In a survey of 2291 ​adults, 708 say they believe in UFOs.   Construct a 90% confidence interval for…

A:

Q: A recent study of 750 internet users in Europe found that 35% of internet users were women. What is…

A: It is given that the study of 750 internet users in Europe found that 35% of internet users were…

Q: A college administrator is interested in determining the proportion of students who receive some…

A:

Q: In a poll of 2,300 likely voters, 966 say that the Philippines spend too little on education. Find…

A: We have given that the sample size n = 2300, favourable cases X =966 and sample proportion p =…

Q: When 500 college students were surveyed, 30% said that they own their car. Construct a 95%…

A: Here we want to find the 95% confidence interval.

Q: f a Random Sample of 450 adults includes 155 who identify as happy, compute an 80% confidence…

A: Given data,n=450x=155sample proportion p=xn=155450=0.34z-value at 80% confidence is Zc=1.282

Q: The Pizza Shop wanted to determine what proportion of its customers ordered an only cheese pizza.…

A:

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.