smart phone manufacturer is interested in constructing a 90% confidence interval for the proportion of smart phones that break before the warranty expires. 84 of the 1700 randomly selected smart phones broke before the warranty expired. Round answers to 4 decimal places where possible.
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A: Given data, n=310 x=205 p=x/n=205/310=0.661 z-value at 99% confidence is Zc=2.576
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Q: Express the confidence interval (68 % , 79.6 % ) in the form of p + ME.
A: The mid-point of the confidence interval gives the value of p-cap.
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A: Sample size n=120Favorable cases x=102Sample proportion p^=x/n=102/120=0.85
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A: Given that sample size n = 400 Number of peoples with kids, X = 344 The critical value of Z at 99%…
Q: Express the confidence interval (48.7 % , 58.5 % ) in the form of p ± E.
A: Given information confidence interval (48.7%,58.5%)
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Q: Out of 240 sample students surveyed, 187 students are planning to take classes during the…
A: We have given that the sample size n=240 and favourable cases X=187. Sample proportion p^ = X/n.
Q: A recent survey showed that among 850 randomly selected subjects who completed 4 years of college,…
A: I'm providing the solution below please do refer it and let me know if you have any queries…
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Q: In a recent year, 6% of cars sold had a manual transmission. A random sample of college students who…
A: It is given that the sample size (n) is 126 and x is 20.
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A: Given, Out of a random sample of 60 freshman at State University, 25 students have declared a major.…
Q: Out of 400 people sampled, 68 had kids. Based on this, construct a 99% confidence interval for the…
A: Solution: Let X be the number of people had kids and n be the number of people sampled. From the…
Q: A report statesb that 33% of home owners had a vegetable garden. how large a sample is needed to…
A: p=33%=0.33, E=5%=0.05
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A: 0.604 < p < 0.713 Explanation:Approach to solving the question:To construct a 95% confidence…
Q: A report statesb that 44% of home owners had a vegetable garden. how large a sample is needed to…
A: Answer: Using the given data, A report stated that 44% of home owners had a vegetable garden, P =…
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A: Given: Number of students that hated the online math course (y) = 324 Number of students (n) = 400…
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Q: Express the confidence interval (45.7 % , 59.5 % ) in the form of p + ME.
A: From the provided information, Confidence interval is (45.7%, 59.5%)
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A: Sample proportion=p^=xn=3413048Critical value for 99% confidence interval is=z=2.576n=sample…
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Q: In a sample of 300 adults, 267 had children. Construct a 90% confidence interval for the true…
A: To construct a 90% confidence interval for the population proportion, we'll use the formula for the…
Q: A smart phone manufacturer is interested in constructing a 95% confidence interval for the…
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Q: In a science fair project, Emily conducted an experiment in which she tested professional touch…
A: Given data, n=330 x=155 sample proportion p=x/n =155/330=0.47 z-value at 95% confidence is zc=1.96
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Q: FIND Za2 FOR THE 99.50 CONFIDENCE INTERVAL
A: Find α/2Level of Confidence = 99.5%α = 100% - (Level of Confidence) = 0.5%α/2 = 0.25% = 0.0025
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A: Sample size (n) = 415Sample mean (x̅) = 5000Standard deviations (s) = 900 Confidence level (c) =…
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- In a recent poll, 230 people were asked if they liked dogs, and 72% said they did. Find the Margin of Error for this poll, at the 90% confidence level. Give your answer to four decimal places if possible.A report states that 46% of home owners had a vegetable garden, how large A sample is needed to estimate the true proportion of home owners who have vegetable gardens to within 3% with 95% confidence.2
- Construct a 96% confidence interval if x=75 and n=200. Round your answers to 3 decimal places.In a recent year, 6% of cars sold had a manual transmission. A random sample of college students who owned cars revealed the following: out of 124 cars, 25 had manual transmissions. Estimate the proportion of college students who drive cars with manual transmissions with 90% confidence. Round intermediate and final answers to at least three decimal places.In a random sample of 296 people, 179 said that they watched educational television. Find the upper bound limit of the 95% confidence interval of the true proportion of people who watched educational television. Round your answer to 3 decimal places.
- Out of 200 people sampled, 76 had kids. Based on this, construct a 90% confidence interval for the truepopulation proportion of people with kids.Give your answers as decimals, to three placesIn a science fair project, Emily conducted an experiment in which she tested professional touch therapists to see if they could sense her energy field. She flipped a coin to select either her right hand or her left hand, and then she asked the therapists to identify the selected hand by placing their hand just under Emily's hand without seeing it and without touching it. Among 337 trials, the touch therapists were correct 163 times. Using Emily's sample results, construct a 95% confidence interval estimate of the proportion of correct responses made by touch therapists. (round to 3 decimal places)A smart phone manufacturer is interested in constructing a 95% confidence interval for the proportion of smart phones that break before the warranty expires. 88 of the 1586 randomly selected smart phones broke before the warranty expired. Round answers to 4 decimal places where possible. a. With 95% confidence the proportion of all smart phones that break before the warranty expires is between and .
- In a sample of 360 adults, 266 had children. Construct a 95% confidence interval for the true population proportion of adults with children. Give your answers as decimals, to three placesOut of 500 people sampled, 200 had kids. Based on this, construct a 90% confidence interval for the true population proportion of people with kids.Give your answers as decimals, to four placesIn a sample of 510 adults, 281 had children. Construct a 95% confidence interval for the true population proportion of adults with children. Give your answers as decimals, to three placesRecommended textbooks for youMATLAB: An Introduction with ApplicationsStatisticsISBN:9781119256830Author:Amos GilatPublisher:John Wiley & Sons IncProbability and Statistics for Engineering and th…StatisticsISBN:9781305251809Author:Jay L. DevorePublisher:Cengage LearningStatistics for The Behavioral Sciences (MindTap C…StatisticsISBN:9781305504912Author:Frederick J Gravetter, Larry B. WallnauPublisher:Cengage LearningElementary Statistics: Picturing the World (7th E…StatisticsISBN:9780134683416Author:Ron Larson, Betsy FarberPublisher:PEARSONThe Basic Practice of StatisticsStatisticsISBN:9781319042578Author:David S. Moore, William I. Notz, Michael A. FlignerPublisher:W. H. FreemanIntroduction to the Practice of StatisticsStatisticsISBN:9781319013387Author:David S. Moore, George P. McCabe, Bruce A. CraigPublisher:W. H. FreemanMATLAB: An Introduction with ApplicationsStatisticsISBN:9781119256830Author:Amos GilatPublisher:John Wiley & Sons IncProbability and Statistics for Engineering and th…StatisticsISBN:9781305251809Author:Jay L. DevorePublisher:Cengage LearningStatistics for The Behavioral Sciences (MindTap C…StatisticsISBN:9781305504912Author:Frederick J Gravetter, Larry B. WallnauPublisher:Cengage LearningElementary Statistics: Picturing the World (7th E…StatisticsISBN:9780134683416Author:Ron Larson, Betsy FarberPublisher:PEARSONThe Basic Practice of StatisticsStatisticsISBN:9781319042578Author:David S. Moore, William I. Notz, Michael A. FlignerPublisher:W. H. FreemanIntroduction to the Practice of StatisticsStatisticsISBN:9781319013387Author:David S. Moore, George P. McCabe, Bruce A. CraigPublisher:W. H. Freeman