Staff at an elementary school are worried that the students are not getting enough physical activity outside of school. They decide to ask a group of 1460 students if they participate in physical activities outside of school. 577 students said that they are not physically active outside of school. What is the point estimate for the true proportion? What is Maximal Margin of Error (E) at 95% confidence? Construct a 95% confidence interval for the true proportion of interest.

Q: In a survey of 3001 ​adults, 1486 say they have started paying bills online in the last year.…

A: Assuming that the number of people paying bills online has a binomial distribution with n=3001, and…

Q: Suppose you want to produce an estimate on the percent of students who return to college after their…

A:

Q: n a survey of 2558 ​adults, 1413 say they have started paying bills online in the last year.…

A: Solution: Given information: n= 2558 Sample size of adults  x = 1413 adults started paying bills…

Q: A survey of 700 non-fatal accidents showed that 167 involved uninsured drivers. Construct a 99%…

A: Given data,n=700x=167Point estimate isp=xn=167700=0.2386Construct a 99% confidence interval?

Q: What is the purpose of finding a confidence interval for a proportion?

A: A true (or population) proportion (denoted as p), by definition, is essentially determined as the…

Q: A sociologist wants to construct a 94% confidence interval for the proportion of teenagers who uses…

A: Given, p=0.23 E=0.02 z value at 94% confidence is Zc=1.88 n=?

Q: Out of 400 people sampled, 32 had kids. Based on this, construct a 95% confidence interval for the…

A: Solution: Let X be the number of people had kids and n be the sample number of people. From the…

Q: a survey of 3447 adults, 1477 say they have started paying bills online in the last year.…

A:

Q: Using the 99% level of confidence, what is the confidence interval for proportion of students…

A: Let X be the random variable such number of students attending home football games. X = 750 N: Total…

Q: What is the t-value for a 95% confidence interval given that the sample size is 16? Write the exact…

A: Given: confidence level =95%  Sample size n=16  Then degree of freedom for t-test is =n-1  To find…

Q: We wish to estimate what percent of adult residents in a certain county are parents. Out of 500…

A:

Q: In a survey of 2552 ​adults, 1423 say they have started paying bills online in the last year.…

A: Given that, In a survey of 2552 adults, 1423 say they have started paying bills online in the last…

Q: How large a sample is necessary to estimate the true proportion of unmarried Canadians aged 25-29…

A: Given data: Margin of error  = 5% = 0.05 Confidence level  = 0.90 To find: Sample size (n) = ?

Q: A research group asked 4488 Americans how they fall asleep, and 536 of them fall asleep on their…

A: Obtain the 90% confidence interval for the percentage of all Americans who fall asleep on their…

Q: In a survey of 3260​ adults, 1456 say they have started paying bills online in the last year.…

A: Givenn=3260x=1456p^=xn=14563260=0.4466

Q: lorry is a researcher who is curious about the proportion of students who are planning to pursue a…

A:

Q: A random sample of 100 employees at a company shows that 62 are female.  Form a 95% confidence…

A:

Q: Construct a​ 99% confidence interval for the population proportion. Interpret the results.

A:

Q: n a survey of 3932 ​adults, 718 oppose allowing transgender students to use the bathrooms of the…

A:

Q: In a survey of 2782 adults, 1411 say they have started paying bills online in the last year.…

A:

Q: Identify the y-score for a 99% confidence interval if the sample size is 35.

A: We have to find critical value for given data..

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

A: Given information- A proportion of parents say they are willing to get a second job or part-time…

Q: In a survey of 2334 adults in a recent​ year,1370 say they have made a New​ Year's resolution.…

A: Given n=2334 X=1370

Q: A researcher wanted to compare the percentages of men and women who play the lottery.  They randomly…

A:

Q: You want to estimate the mean number of friends for all Facebook users. How many users must be in…

A: Given that, Population standard deviation σ=53 Margin of error E=7 Confidence level is 95%

Q: What are two ways to get a narrower confidence interval for a proportion?

A: Two ways to get a narrower confidence interval for a proportion are:

Q: You receive a brochure from a large university. The brochure indicates that the mean class size for​…

A: Sample size is, Population mean is Confidence Level is The objective is to test the claim that the…

Q: In a survey of 3071 ​adults, 1484 say they have started paying bills online in the last year.…

A: Given, Therefore, As per z-distribution table the critical value of z at 0.01 level of significant…

Q: In a survey of 3342 adults, 1489 say they have started paying bills online in the last year.…

A: Given Information: To construct a 99% confidence interval for the population proportion and…

Q: From a lake, an unknown proportion of fish have been tagged.  You collect a sample of 100 fish taken…

A:

Q: In a survey of 3426 ​adults, 1487 say they have started paying bills online in the last year.…

A: From the provided information, Sample size (n) = 3426 Out of which 1487 say they have started paying…

Q: Identify the y-score for a 95% confidence interval if the sample size is 15.

A: The confidence level is 0.95.

Q: 700 randomly selected Americans were asked if they believed the minimum wage should be raised. 350…

A: Given that  p = 700 x = 350 Confidence level(c) = 90% = 0.90 Significance level (α) = 1-c = 1-0.90=…

Q: A psychologist asked a random sample to complete a depression questionnaire. On average, children…

A: The 95% confidence interval for the population mean depression score of children, will signify that,…

Q: In a survey of 3246 ​adults, 1418 say they have started paying bills online in the last year.…

A: Given information Number of adults surveyed(n) = 3246 Number of people who started paying bills…

Q: A psychologist asked a random sample to complete a depression questionnaire. On average, children…

A: We assume the population is normally distributed.

Q: We wish to estimate what percent of adult residents in a certain county are parents. Out of 100…

A: Given,Sample size(n)=100no.of parents(X)=15

Q: Compute the probability of successfully completing the task for an engineer having 24 months of…

A: Given the data of monthly experience of the task is a success or not for 2 engineers as shown below…

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.