In order to estimate the percentage of adults who file their taxes at least tw deadline, a 99% confidence interval is constructed. The interval ends up being from 0.756 to 0.864. Which of the following could be a 90% confidence interval for the same sample data? I. 0.749 to 0.871 II. 0.776 to 0.844 III. 0.765 to 0.875 IV. 0.799 to 0.841 IV only None of the answer options are reasonable 90% confidence intervals. O III only Il only OI only

Q: Order to estimate the percentage of adults who file their taxes at least two weeks before the April…

A: Given that  95% confidence interfull is constructed. The interval ends up being from 0.759 to 0.841

Q: A researcher found a 95% confidence interval for the proportion of college students who believe in…

A:

Q: If n = 400 and X = 25, construct a 99% confidence interval estimate for the population proportion

A: It is given that Sample size n = 400 Numbervof sucessess, X = 25 The critical value of Z at 99%…

Q: The following sample data are from a normal population: 10, 8, 12, 15, 13, 11, 6, 5. What is the…

A: Given data is10,8,12,15,13,11,6,5sample size(n)=8sample mean(x¯)=10standard…

Q: Calculate a 95% confidence interval on the mean rating for each hospital. Plot the intervals and…

A: Given Information :  Hospital comparison data . A healthcare consultant wants to compare the patient…

Q: ccording to the data, calculate a 90% confidence interval for the sample mean. What was the T Score…

A: Solution: n= 30 Sample size ∑xi=642 x=∑xin=64230=21.4 Sample mean s2=∑(xi-x)2n-1=56.52414 Sample…

Q: A​ 95% confidence interval for the proportion of U.S. adults who subscribe to some sort of streaming…

A: In the above question, we are given,  a confidence interval is

Q: Determine the 99.5 percent confidence interval that contains the population variance if the sample…

A:

Q: A researcher wants to make a ninety-five percent confidence interval for the population mean. She…

A: From the given information,Margin of error , E = 0.56 Population variance, 7.6 Using formula ,

Q: If n=590 and p=0.93, construct a 90% confidence interval.

A: Express the expression for the confidence interval. C.I=p±Z*p(1-p)n Here, Z* is the critical value .…

Q: The daily salaries of security guards for 10 security agencies are as follows: P350, P400, P375,…

A: Solution To find the point estimate we will find the sample mean.

Q: In order to estimate the percentage of adults who file their taxes at least two weeks before the…

A: The given 95% confidence interval is, 0.759 to 0.841 The values of sample proportion and margin of…

Q: Here are summary statistics for randomly selected weights of newborn girls: n = 250, x= 32.4 hg, s=…

A: The following information has been provided: The sample size is n=20. The sample mean is x¯=32.5.…

Q: In order to estimate the percentage of adults who file their taxes at least two weeks before the…

A:

Q: In the estimation of the population mean, what if given that last year mean is 7.05 and SD is…

A: Confidence Interval provides a range of values for the estimated parameter.

Q: If n = 520 and X = 416, construct a 99% confidence interval for the population proportion, p. Give…

A:

Q: f n=300 and x=60, construct a 99% confidence interval estimate for the population proportion.

A: n=300 and x=60, construct a 99% confidence interval

Q: A sample with 45 observations is taken. The mean is found to be 25, while the population standard…

A:

Q: If n=400 and X=100​, construct a 99​% confidence interval estimate for the population proportion

A: According to the given information, we have n = 400 X = 100 Confidence level = 99%

Q: ample mean of 62.2 was found and a 95% confidence interval of (57.3, 67.1) was also found. What is…

A: The sample mean for the  population is 62.2  . Confidence interval is (57.3 , 67.1)

Q: If X̅ = 65, ? = 20 ??? ? = 36, construct a 95% confidence interval estimate for the population mean,…

A:

Q: The following sample data are from a normal population: 15, 11, 30, 19, 22, 25, 33 28, and 36.…

A: Given: The sample data from normal population 15,11,30,19,22,25,33,28,36. n=9C.I.=0.98

Q: he standard deviation and the mean of 25 students scores are 10 and 38, respectively. Construct a…

A: Given that  Sample size (n) = 25 Mean (x¯) = 38 Standard deviation (s) = 10 Confidence level (C) =…

Q: Use the given data to construct a confidence interval for the population prop of the requested…

A: x=56n=7395% confidence interval

Q: In a sample of 7 observations, the values are 17, 11, 12, 13, 14, 15, 16. Find the 95% confidence…

A:

Q: The following sample data are from a normal population: 10,9,12,14,13,11,6,5 c. With 95%…

A: The sample observations are: 10, 9, 12, 14, 13, 11, 6, 5.The sample observations, n=8.

Q: The daily salaries of security guards for 10 security agencies are as follows: P350, P400, P375,…

A: Confidence interval of a mean using T distribution

Q: If n=470 and p̂ (p-hat) = 0.65, construct a 95% confidence interval.

A: From the provided information, Sample size (n) = 470  p̂ (p-hat) = 0.65 Confidence level = 95%

Q: Suppose you needed to form a 92% confidence interval for a population mean. What z value would you…

A:

Q: If a sample proportion is 0.68, which of the following could be a 90% confidence interval for the…

A: The confidence interval formula of population proportion is (p̂ ± E), where p̂ is the sample…

Q: We asked 41 people to report the number of cars they've ever owned. The results are a mean of 4.6…

A:

Q: For what type of variable does it make sense to construct a confidence interval about a population​…

A: Qualitative variable: A variable which cannot be measured in numerically is known as a Qualitative…