An online grocery company is researching the best location to start their new delivery service. They are comparing two local regions, A and B. In a random sample of 505 residents in region A, 26.1% said that they would use an online grocery store. In a random sample of 388 residents in region B, 29.5% said they would use an online grocery store. Find a 95% confidence interval for the difference in the proportions of residents in these two regions who would use an online grocery store. The CEO believes that region B will have a higher proportion of potential customers than region A. Does your confidence interval support that conclusion? Explain.

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A: Point estimate=0.81

Q: A study was performed to determine the percentage of people who wear life vests while out on the…

A: Answer  Given  Sample proportion [p1] =0.886 Sample proportion [p2] =0.935 sample size [n1] =500…

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A:

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A:

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A:

Q: In a study of cell phone use and brain hemispheric dominance, an Internet survey was e-mailed to…

A: Note: Thank you for the question. Since multiple subparts are posted, according to our policy, we…

Q: 99% confidence interval for the proportion of the high school students who have been cyberbullied,…

A: Given that Sample size n = 14795 Number of high school students who have cyberbullied, X = 2219 The…

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A: Given : Given : n1 = 1000 n2 = 1500 confidence level,c=0.95 Significance…

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

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A:

Q: A medical researcher claims that smoking can result in the wrinkled skin around the eyes. The…

A: Given Information: Smokers: n1=150 x1=95 Nonsmokers: n2=250 x2=105 Confidence level is 95%

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Q: improvement, two economists predicted no change, and four economists predicted a decline in the…

A: Here use one proportion z test

Q: According to a poll, 77% of California adults (389 out of 506 surveyed) feel that education is one…

A: Given that the number of favorable cases Favorable Cases XX = 389389 Sample Size NN = 506506…

Q: In a random sample of 315 people 90 of them were smokers. Based on the above sample test whether the…

A:

Q: . A sociologist develops a test to measure attitudes about public transportation, and 20 randomly…

A: Answer - A sociologist develops a test to measure attitudes about public transportation,…

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A:

Q: A summary at the beginning of the report states "All drivers want some kind of workplace benefit."

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Q: hey were ased to enve foowing a the average etance bete the diver (ne distraction - reading tet…

A: Solution: Given information: n= 50 Sample size  xd = 1.6 Difference of sample mean sd= 1.63…

Q: several years ago, 48% of parents who had children in grades K-12 were satisfied with the quality of…

A: Given that  Sample size n =1035 Favorable cases x =497 Sample proportion p^=x/n  =497/1035 =0.4802

Q: second-semester junior at a large high school wants to estimate the number of colleges a senior…

A: Solution

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.