To assess the proportion of the readers of a magazine being professional, a random sample of 1000 readers is selected and 660 are found to be professionals. Construct a 99% confidence interval for the population proportion of readers who are professionals. Explain clearly the

Q: survey to determine if the percentage of adults who use social media has changed from 52%, which was…

A: The sample proportion is computed as follows, The critical value for 96% confidence level, i.e.,…

Q: In a survey of 2274 adults, 749 say they believe in UFOs. Construct a 99% confidence interval for…

A:

Q: Out of 500 people sampled, 395 had kids. Based on this, construct a 90% confidence interval for the…

A: It is given that 395 out of 500 people sampled had kids. The sample proportion is 395/500 = 0.79.…

Q: Insurance companies are interested in knowing the population percent of drivers who always buckle up…

A:

Q: In a survey of 2000 adults in a recent​ year, 708 made a New​ Year's resolution to eat healthier.…

A: Confidence interval for population proportion is given by, p^ +- z* √(pq/n) At 90% z = 1.645 At 95%…

Q: A medical director needs to know the proportion of patients who have a single bed in their room. A…

A: It is given that sample size (n) is 200 and p-hat value is 0.59.

Q: In a survey of 2004 adults in a recent​ year, 717 made a New​ Year's resolution to eat healthier.…

A:

Q: In one city, 59.6% of the 1500 students surveyed said they eat at the school cafeteria. Find the 95%…

A: Given, Sample size=n=1500 p^=0.596 α=0.05

Q: in a survey of 2042 adults in a recent​ year, 715 made a New​ Year's resolution to eat healthier.…

A:

Q: What type of educational background do CEOs have? In one survey, 344 CEOs of medium and large…

A:

Q: According the the U.S. Census bureau, the percentage of Santa Ana residents living in poverty is…

A: Given: p^1=0.177p^2=0.133n1=1200n2=1500

Q: In a survey of 4061 ​adults, 738 say they have seen a ghost. Construct a​ 99% confidence interval…

A: In this question, it has been given that 738 people out of 4061 people have seen the ghost, we have…

Q: business conducts a random sample of 89 of its customers and find that 44 of them think the company…

A:

Q: aOf 500 random people surveyed, 72 were smokers. Find the 80% confidence interval for smokers.

A: It is given that, Out of 500 random people surveyed, 72 were smokers. So, the portion of the…

Q: The figure to the right shows the results of a survey in which 2500 college graduates from the year…

A: Expected to their first employer for 3 or more years: The sample size n= 2500.for The sample…

Q: hen you have two independent populations, explain the similarities and differences between the test…

A: Our aim is to explain the similarities and differences between the test of hypothesis for the…

Q: A researcher wants to do a study to see what the proportion of vaccinated people is in a certain…

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Q: A survey showed 980 of 1500 adult respondents believe in global warming. Construct a 95% confidence…

A:

Q: A poll showed that 385 out of 700 adults said they would be interested in traveling to outer space…

A: This question requires accurate results, Hence I will use excel to solve this question.…

Q: Construct a 95% confidence interval for the proportion of college students who say they own their…

A: Given : n=410 , X=155  , α=0.05 We want to find the 95% confidence interval for the proportion of…

Q: If a 90%, a 95% and a 99% confidence interval are foung for a population mean, describe how the 3…

A: Population mean CI for known population standard deviation is, CI=x¯±Zσnwhere,σ=population standard…

Q: any fans of ‘80’s music believe that the song “Open Arms” by the band Journey is an iconic song in…

A: Solution: Given information: Margin of error = E = 0.05 Confidence level = 0.90= 0.90 Assumed…

Q: In a sample of 480 adults, 384 had children. Construct a 99% confidence interval for the true…

A: The random variable adults with children follow normal distribution. We have to construct 99%…

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: Use the sample data and confidence level given below to complete parts (a) through (d). A research…

A: Given; x=561n=935The level of significance is;α=1-0.95=0.05 (a) The best point estimate of the…

Q: Out of 400 people sampled, 336 had kids. Based on this, construct a 95% confidence interval for the…

A: Given that out of 400 people sampled, 336 had kids.  95% confidence level

Q: If n= 100 and x= 80, construct a 99% confidence interval.  Give your answers to three decimals

A:

Q: A Surprising fact indicates that a small proportion of teens use a password on their mobile device.…

A:

Q: Measuring the height of a California redwood tree is very difficult because these trees grow to…

A: 1.The 95% confidence interval estimate of the population slope between the height of the redwood…

Q: One year’s survey results, of 1525 respondents, 846 said that they expected difficulty finding a…

A:

Q: Many high school students take the AP tests in different subject areas. In one year, of the 144,651…

A: given datax1 = 84698n1 = 144651 p^1 =X1n1  = 84698144651 =0.5855    x2 = 125498n2 = 214919 p^2 =x2n2…

Q: Melissa wants to estimate the proportion of adults in the U.S. who own a gun. To do so, she surveys…

A: Given information: Sample size of adults is 45, that is, n = 45. Number of adults who own a gun is…

Q: An economist wants to know if the proportion of the children in the United States that speak a…

A: It is given that sample proportion p-hat is 0.22 and the margin of error is 0.02.

Q: Students at a certain college were asked if they have a car. After surveying 354 students, it was…

A: from the given data,point of estimate = proportion = 0.267margin of error =…

2-Proportion Test

In a 2-proportion test, two separate proportions are measured at the same time, and their similarity is evaluated. It is also known as a 2-proportion z-test, and a comparison of two different proportions is done in this method.