In a simple random sample of size 55, taken from a population, 20 of the individuals met a specified criteria. a)  What is the margin of error for a 90% confidence interval for p, the population proportion? Round your response to at least 4 decimal places.         b)  What is the margin of error for a 95% confidence interval for p? Round your response to at least 4 decimal places.         NOTE: These margin of errors are greater than .10 or 10%. c) How big of a sample is needed to be certain that we have a margin of error less than .10 (or 10%) at 90% confidence?

Q: Given that 200 items of 800 are defective, construct the following confidence intervals for the…

A:

Q: In a survey of 2494 adults in a recent​ year, 1446 say they have made a New​ Year's resolution.…

A:

Q: The correct value of Z to use for an 80% confidence interval for is: O A. 1.96 О В. 1.28 O C. 2.33 O…

A:

Q: Construct a 90% confidence interval estimate for the population proportion of consumers that value…

A: We have n=11000 p= proportion of consumers value personalized experience most.    = 26% a=alpha=…

Q: Researchers randomly selected 50 males between the ages of 25 and 44 years to participate in a…

A: The given 95% confidence interval for the proportion of all males between 25 and 44 years old with…

Q: In a survey of 749 lesbian, gay, bisexual, or transgender adults in a certain country, 391 said that…

A: In this case, the sample size (n) is the total number of lesbian, gay, bisexual, or transgender…

Q: According to a survey, 66% of all students in the U. S. own a laptop. For a simple random sample of…

A:

Q: Listed below are speeds (mi/h) measured from traffic on a busy highway. This simple random sample…

A: Obtain the 80% confidence interval for the population standard deviation. The 80% confidence…

Q: Assume that a sample is used to estimate a population proportion p. Find the 95% confidence interval…

A:

Q: A survey asked, "How many tattoos do you currently have on your body?" Of the 1223 males surveyed,…

A: From the given information, 1223 males surveyed, 188 responded that they had at least one tattoo.…

Q: In a random sample of 75 college students 60 of them had sunglasses.  Compute a 95% Confidence…

A: Thank you for posting the question. Since you have asked multiple question, we will solve the first…

Q: Assume that a sample is used to estimate a population proportion p. Find the 80% confidence interval…

A: Solution-: Given: Find the 80% C.I. for proportion

Q: The Graduate Schools take a random sample of recent MS graduates (n=135) and finds that 12 of these…

A: Givenn=135x=12confidence interval = 90%p^=xn=12135=0.0889α=1-0.90=0.10α2=0.05zc=zα2=z0.05=1.6449…

Q: A random sample of 500 items reveals that 325 of the items have the attribute of interest. a. What…

A: Solution: a. Let X be the number of items have the attribute of interest and n be the sample number…

Q: A simple random sample of 800 elements generates a sample proportion  p = 0.69.  (Round your…

A: Given,p=0.69n=8001-p=1-0.69=0.31α=1-0.95=0.05α2=0.025Z0.025=1.96

Q: 10. In a survey of 1052 parents of children ages 8-14, 61% say they are willing to get a second or…

A: Sample size, n=1052 Sample proportion, p^=0.61 Margin of error, E=±2%

Q: 1.       Confidence Intervals for the Average Relative Skill of All Teams in the Assigned Team’s…

A: Given information: The 95% confidence interval for the average relative skill of teams in the Bull's…

Q: In a survey of 1072 adults, a poll asked, "Are you worried or not worried about having enough money…

A:

Q: Gallup Organization poll of n= 856 randomly selected American adults in October 2017 found that 60%…

A: Fkk

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: Assume that a sample is used to estimate a population proportion p. Find the 99% confidence interval…

A: Given:CL = 99% = 0.99n = 260p̂ (success) = 67% = 0.67Since the sample size (n) ≥ 30, then we will be…

Q: In a survey of 2105 adults in a recent year, 737 made a New Year's resolution to eat healthier.…

A:

Q: Use the given degree of confidence and sample data to construct a confidence interval for the…

A: Given data,n=786x=10p=x/n=10/786 =0.0127z-value at 98% confidence is Zc=2.326

Q: Estimate a 98% confidence interval for the population mean using the below sample data, n= 25, x…

A: sample size(n)=25 Mean(x)=71.3 standard deviation(s)=3.2 confidence level=98%

Q: In a survey of 658 lesbian, gay, bisexual, or transgender adults in a certain country, 427 said that…

A: A 90% confidence interval for the population proportion is (0.618, 0.680). Interpretation: We are…

Q: Construct a 90% confidence interval to estimate the population mean when x = 122 and s = 34 for the…

A: df = n-1 = 20-1 = 19

Q: In a survey of 2055 adults in a recent​ year, 722 made a New​ Year's resolution to eat healthier.…

A: Givenx=722n=2055p^=xn=7222055=0.351

Q: Construct the confidence interval for the population mean u. c= 0.98, x = 16.4, o = 2.0, and n= 100…

A:

Q: Assume that a sample is used to estimate a population proportion p. Find the 95% confidence interval…

A: It is given that, 88% of the 210 samples lead to success. Thus, the sample size n = 210 and the…

Q: In a survey of 2477 adults in a recent​ year, 1454 say they have made a New​ Year's resolution.…

A: Givenx=1454n=2477p^=xn=14542477=0.5870

Q: A statistics instructor randomly selected four bags of oranges, each bag labeled 10 pounds, and…

A: Confidence Rate = 95 Value Level = Î ± = (100-95)% = 0.05 Degrees of freedom = n-1 = 4 -1 = 3 Value…

Q: A poll found that82​%of a random sample of 1093 adults said that they believe in ghosts. a.…

A: a) Given that n=1093p^=82%=0.82Confidence level=99%=0.99Significance level=0.01 The z critical value…

Q: Assume that a sample is used to estimate a population proportion p. Find the 98% confidence interval…

A: Given,   Sample size = 257 Sample proportion = 0.50   Critical value: Using z-table, the z-critical…

Q: Given a confidence interval  (0.08, 0.22),  what is the margin of error?

A: The confidence interval is (0.08, 0.22).

Q: The mean test score of a sample of 28 students in a Statistics class is 85, with a standard…

A:

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.