Create and interpret a 90% confidence interval for the parameter of interest.

Q: A recent study of high school students shows the percentage of females and males who have at LEAST…

A: The (1-α)% confidence interval for the difference in population proportions p1-p2 is given by;…

Q: A poll of 827 students at Alpha State College found that 61% of those polled preferred a quarter…

A: Given that Sample size n = 827 Sample proportion of students who prefer a quarter system = 0.61 The…

Q: A volunteer wearing a caveman mask was scolded by 158 out of 444 crows he encountered, and the crows…

A: Given information, In a study, a volunteer wear a caveman mask scolded by 158 out of 444 crows he…

Q: A manager needs to know the proportion of employees who have insurance. He selects 200 employees and…

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Q: A board-game club meets each week at the local library. People bring different board games to play,…

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Q: In a survey of 1250 U.S. adults, 363 said that their favorite sport to watch is football. The 95%…

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Q: When constructing a confidence interval, if we construct a confidence interval with a 95% confidence…

A: The general formula for the width of the confidence interval is,

Q: A 95% confidence interval for the proportion p active voters in the municipality of Aibonito is 0.57…

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Q: In studying his campaign plans, Mr. Singleton wishes to estimate the difference between younger…

A: sample size(n1)=769x1=497sample size(n2)=703x2=390confidence level=90%

Q: As Senior Class President, one of your lifelong duties is overseeing the planning of your high…

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Q: A polling agency conducted a survey by selecting 100 random samples, each consisting of 1,200 United…

A: The objective of the question is to understand the correct interpretation of a 95% confidence level…

Q: A principal of a large high school wants to estimate the true proportion of high school students who…

A: Given information- Sample size, n = 50 For a random sample of 50 students, the 95% confidence…

Q: A researcher was interested in knowing how many people in the city supported a new tax. She sampled…

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Q: A poll of 827 students at Alpha state college found that 61% of those polled preferred a quarter…

A: It is given that the proportion of the students who preferred a quarter system to a trimester…

Q: Out of all the students that attend Yale University, 1,982 were selected to participate in a school…

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Q: A researcher wanted to check whether the percentage of Canadian adults with obesity has decreased in…

A: Number of Canadian adults in 2005= 75 Number of Canadian adults in 2009 = 120   significance level =…

Q: To test the effect of a physical fitness course on one's physical ability, the number of sit-ups…

A: In estimation, there are two types of estimation, point estimation, and interval estimation. In…

Q: What proportion of the sample reported that they had been cyberbullied?

A: Givensample size(n)=14795No.of respondents say yes they had been cyberbullied(x1) = 2219No.of…

Q: one with a 95% confidence level and the other with a 99.7% confidence level. Which interval is…

A: Confidence interval is probability, which refers that population parameter will fall within set of…

Q: A recent survey of 54,000 randomly selected adults studied the religious affiliations of Americans.…

A: From the provided information, Sample size (n) = 645 From which 116 said they claimed no religious…

Q: A poll conducted randomly in 2014 found that 52% of U.S. adult Twitter users get at least some news…

A: Proportion is 0.52. The standard error 0.024 The absolute value of Zα/2 is 2.5758 using the Excel…

Q: A health insurance firm wants to estimate the proportion of a population that would receive the flu…

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Q: A polling agency conducted a survey by selecting 100 random samples, each consisting of 1,200 United…

A: The objective of the question is to understand the correct interpretation of a 95% confidence level…

Q: o test the effect of a physical fitness course on one's physical ability, the number of sit-ups that…

A: Solution:  Let x = Sit ups before  and y = Sit ups after  x y d=y-x (d-d) (d-d)2 34 49 15 7.1…

Q: According to this equation, what is the predicted value of the dependent variable when the…

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Q: The County Development Agency does a survey of all the mobile home manufacturers in Clarion County…

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Q: A publishing company is studying the sales of various franchises in their chain of stores. A…

A: We are given confidence intervals for the population mean daily sales at 90%, 95%, 97% and 99%…

Q: Records from the Washington Department of Licensing show that 47 former SFCC business students have…

A: Given data is 7 , 12 , 13, 17, 10, 5 , 10 , 6sample size(n)=8

Q: Examining a random sample of records from my past Statistics classes, I found the 47 of the 282…

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Q: An insurance company collects data on seat-belt use among drivers in a country. 90% confidence…

A: Givenn1=2000p1^=28%=0.28P2^=xn2=4821500=0.32α=1-0.90=0.10α2=0.05zc=zα2=z0.05=1.6449      (from z…

Q: You are going to construct a 99% confidence interval for the proportion of hip replacement…

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Q: wenty years ago, a very famous psychologist specializing in marriage counseling authored a book…

A: Solution: Given information n= 275 Sample size of couples who bought book. X= 217  stayed together…

Q: In a random sample of 600 adults, 270 described themselves as vegetarians. Construct a 99%…

A: In a random sample of 600 adults, 270 described themselves as vegetarians.

Q: An epidemiologist is worried about the prevalence of the flu in East Vancouver and the potential…

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Q: Find 90% confidence interval for the true proportion of all medical students who plan to work in a…

A: Given : Sample Size, n = 300 Number of successes, x = 30

Q: An environmental science teacher at a high school with a large population of students wanted to…

A: Given information: To obtain a potentially less biased estimate of the proportion, a statistics…

Q: A magazine publisher wishes to determine what proportion of current subscribes will renew. The…

A: we have given that  sample size n=200 and favorable cases x=108  sample proportion p^= x/n =108/200…

Q: For each scenario, use the drop-down menu to identify if the intended inference is a Confidence…

A: Given 4 scenarios to identify whether the intended inference is a Confidence Interval or a…

Q: An environmental science teacher at a high school with a large population of students wanted to…

A: Question : (b) Given the method used by the environmental science teacher to collect the responses,…

Q: In a study investigating the difference in food preferences between men and women, researchers asked…

A: In a study investigating the difference in food preferences between men and women, researchers asked…