Leakage from underground fuel tanks has been a source of water pollution. In a random sample of 107 gasoline stations, 18 were found to have at least one leaking underground tank. A) Construct a 98% confidence interval for the proportion of gasoline stations with at least one leaking underground tank. B) Give a verbal interpretation of the 98% confidence interval.
Q: 1) A sample of 532 Peanut Butter M&M's contains 74 yellow candies; write a 95% confidence statement…
A: In this case, the confidence level is 95%. The 95% confidence interval for the proportion/percentage…
Q: Isabel Myers was a pioneer in the study of personality types. According to one of her surveys, in a…
A: Solution
Q: Thirteen out of the 137 randomly selected faculty members who were surveyed at a community college…
A: Obtain the 90% confidence interval for the proportion of all faculty member at the community college…
Q: A study of 420,082 cell phone users found that 135 of them developed cancer of the brain or nervous…
A: Proportion is almost similar to the concept of probability. Proportion is a fraction of population…
Q: joint USA Today/CNN/Gallup Poll in July 2020 indicated that of 832 white adults, 46% thought…
A: Given n=832 P=0.46
Q: University personnel are concerned about the sleeping habits of students and the negative impact on…
A: Given Information: Sample size (n) = 377 Out of which X = 209 students reported experiencing…
Q: knowing
A: Given: Total number of drivers = 383 Drivers who buckle up = 297 Proportion of drivers, p =…
Q: In a study of cell phone use and brain hemispheric dominance, an internet survery was emailed to…
A: Obtain the 90% confidence interval for the true proportion of the returned surveys. The 90%…
Q: An issue of Time Style and Design reported on a poll conducted by Schulman Ronca & Bucuvalas Public…
A: (a)given that,possible chances (x)=410size(n)=603success rate ( p )= x/n = 0.6799point of estimate =…
Q: Find a 95% confidence interval for the proportion of all U.S. adults with household incomes of at…
A: We need to construct the 95%95\%confidence interval for the population proportion. We have been…
Q: a. Use the sample data to construct a 95% confidence interval estimate of the percentage of cell…
A: Given that Sample size n = 420078 Number of cell phone user who developed cancer, X = 130 The…
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: Of 127 randomly selected adults, 31 were found to have high blood pressure. Construct a 95%…
A: Given that, Of 127 randomly selected adults, 31 were found to have high blood pressure. X = 31 N =…
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: A company reported that 76% of 1700 randomly selected college freshmen returned to college the next…
A:
Q: In a survey of 3115 adults aged 57 through 85 years, it was found that 86.1% of them used at…
A:
Q: An engineering management intern was tasked with estimating the proportion of late shipments leaving…
A: Number of sample observations n=121number of favorable cases =98
Q: In a clinical trial, 50 patients who received a new medication are randomly selected. It was found…
A: Solution: Let X be the number of patients suffered serious side effects from this new medication and…
Q: A study of 420,098 cell phone users found that 0.0324% of them developed cancer of the brain or…
A: sample size(n)=420098sample proportion()=0.0324%=0.000324
Q: In a study of cell phone use and brain hemispheric dominance, an Internet survey was e-mailed to…
A: It is given that, n=2416 and x=1010.
Q: As customer satisfaction manager for a large utilities company, you randomly select 200 customer…
A: We have given that n = 200 x = 21 Confidence level (c) = 95% = 0.95
Q: In a study of cell phone use and brain hemispheric dominance, an Internet survey was e-mailed to…
A: Here we need to construct a 90% confidence interval for the proportion of returned survey. Sample…
Q: An issue of Time Style and Design reported on a poll conducted by Schulman Ronca & Bucuvalas Public…
A: (a)given that,possible chances (x)=410size(n)=603success rate ( p )= x/n = 0.6799point of estimate =…
Q: n a randomly selected group of 750 automobile deaths, 240 were alcohol related. Construct a 95%…
A: Given that, x = 240, n = 750 The value of sample proportion is,
Q: search for the Ford Motor Company, you find that a random sample of 800 households includes 721 in…
A: At 98% confidence level, the z value is 2.33 which can be obtained by using the standard normal…
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,…
Q: Of 100 patients selected at random from a clinic, 33 were found to have high blood pressure.…
A:
Q: In a random sample of 575 American goods, about 46.3% of them were transported by rail in 2017.…
A: Given, Sample size = 575 Sample proportion = 0.463 Critical value: Using z-table, the z-critical…
Q: Insurance companies are interested in knowing the population percent of drivers who always buckle up…
A: Givenx=316sample size(n)=391Confidence level=95%p^=xn=316391≅0.8082
Q: In a randomly selected group of 650 automobile deaths, 180 were alcohol-related. Construct a 95%…
A:
Q: Of 346 items tested, 22 are found to be defective. Construct the 98% confidence interval for the…
A: Solution: Let X be the number of items found to be defective and n be the sample number of items…
Q: Insurance companies are interested in knowing the popul drivers who always buckle up before riding…
A: Given data,No of people surveyed n=387who claims to buckle up is x=311Construct a 93 % CI?
Q: A study of 420,007 cell phone users found that 136 of them developed cancer of the brain or…
A: Given, n = 420007 X = 136 p^ = Xn = 136420007 = 0.000324 Confidence level = 0.90 To find, a. 90%…
Q: f 260 employees selected randomly from one company, 18.46% of them commute by carpooling. Construct…
A: Given data, n=260 p=18.46% =0.1846 z-value at 98% confidence is Zc=2.326
Q: A study of 420,098 cell phone users found that 0.0324% of them developed cancer of the brain or…
A: The question is about confidence interval.Given :Sample no. of cell phone users ( n ) = 420098Sample…
Q: In a sample of 95 recommendations, it is found that 56% of them made money. Determine the upper…
A: Proportion is almost similar to the concept of probability. Proportion is a fraction of population…
Leakage from underground fuel tanks has been a source of water pollution. In a random sample of 107 gasoline stations, 18 were found to have at least one leaking underground tank.
-
A) Construct a 98% confidence interval for the proportion of gasoline stations with at least one
leaking underground tank.
-
B) Give a verbal interpretation of the 98% confidence interval.
Trending now
This is a popular solution!
Step by step
Solved in 2 steps with 4 images
- University personnel are concerned about the sleeping habits of students and the negative impact on academic performance. In a random sample of 377 U.S. college students, 209 students reported experiencing excessive daytime sleepiness (EDS). Is there sufficient evidence to conclude that more than half of U.S. college students experience EDS? Use a 5% level of significance STATE: What is a 90% confidence interval estimate for the proportion of all of U.S. college students who experience excessive daytime sleepiness? PLAN: State the name of the appropriate estimation procedure (e.g. one-sample t confidence interval for estimating the mean difference) Note: You have already described the parameter being estimated in Part A, so you don't have to repeat it here.A Gallup poll of 1487 adults showed that 43% of the respondents have Facebook pages. Construct a 95% confidence interval for the proportion of adults who have a Facebook page.Ms. Rains believes more seniors from PLD plan to attend college than seniors at Lafayette. In a random sample of 35 PLD seniors, 21 responded they plan to attend college. In a random sample of 32 Lafayette seniors only 17 responded they plan to attend college. Using a 95% confidence interval, predict the true difference in the proportion of seniors at PLD and Lafayette who plan to attend college and comment on Ms. Rains' belief.
- The International Air Transport Association surveys business travelers to develop quality ratings for transatlantic gateway airports. The maximum possible rating is 10. Suppose a simple random sample of 50 business travelers is selected and each traveler is asked to provide a rating for the Miami International Airport. The ratings obtained from the sample of 50 business travelers follow. 9 1 1 1 8 8 8 9 1 8 9 8 1 8 8 7 7 5 8 4 9 8 9 1 1 7 7 Develop a 95% confidence interval estimate of the population mean rating for Miami. Round your answers to two decimal places. 4 7 6 8 8 4 I 10 10 1 1 8 7 8 8 10 7 9 7 8 1 6 10 7Researchers from a national research organization investigated which platform (television, social media, newspaper, Internet, etc.) United States adults prefer to use to obtain their news. In 2016, of the 200 randomly selected United States adults that were surveyed, 114 selected television as their preferred platform. In 2018, of the 200 randomly selected United States adults that were surveyed, 98 selected television as their preferred platform. The conditions for inference are met. A 95 percent confidence interval for the difference in the population proportions of United States adults that use television as their preferred platform for obtaining news between 2016 and 2018 (2016 minus 2018) was found to be (-0.02, 0.18). Based on the interval, is it reasonable for the researchers to claim that there is convincing statistical evidence that the population proportion of United States adults that use television as their preferred method to obtain news differed between 2016 and 2018? (A)…A college administrator is interested in determining the proportion of students who receive some sort of financial aid. Instead of examining the records for all students, the administrator randomly draws 120 students and finds that 48 of them are receiving financial aid. Use a 90% confidence interval to estimate the true proportion of students who receive financial aid.
- According to some car loan statistics, 44% of Americans are relying on an auto loan to pay for their cars. Assuming this finding to be based on a simple random sample of 1500 Americans, construct and interpret the 95% confidence interval for the population proportion of Americans who have a car loan.In a study designed to determine whether there was a cluster of brain cancer cases at a Pratt & Whitney plant, record from 223,000 employees were studied and 723 employees with brain tumors were found. Treat those employees as a random sample and construct a 95% confidence interval estimate of the proportion of all adults who develop such tumors. write a brief statement interpreting that confidence interval.In a survey of 813 human resource professionals concerning challenges they faced in the workplace, 321 said that employee retention was an important challenge and 194 said that employee satisfaction was an important challenge. the 95% confidence interval estimate for the population proportion is
- A study of 420,039 cell phone users found that 131 of them developed cancer of the brain or nervous system. Prior to this study of cell phone use, the rate of such cancer was found to be 0.0443% for those not using cell phones. Complete parts (a) and (b). ..... a. Use the sample data to construct a 95% confidence interval estimate of the percentage of cell phone users who develop cancer of the brain or nervous system. • D%A study examined the interactions in a children's museum. (Interactions by visitors to the museum included show-and-tell, learning, teaching, refocusing, participatory play, advocating, and disciplining interactions.) Researchers observed a sample of 154 meaningful interactions, of which 73 were led by children and 81 were led by adult caregivers the target point estimate is 0.474 what is The 90% confidence interval?A study of 420,097 cell phone users found that 137 of them developed cancer of the brain or nervous system. Prior to this study of cell phone use, the rate of such cancer was found to be 0.0311% for those not using cell phones. Complete parts (a) and (b). .... a. Use the sample data to construct a 90% confidence interval estimate of the percentage of cell phone users who develop cancer of the brain or nervous system. %SEE MORE QUESTIONSRecommended textbooks for youMATLAB: An Introduction with ApplicationsStatisticsISBN:9781119256830Author:Amos GilatPublisher:John Wiley & Sons Inc
Probability and Statistics for Engineering and th…StatisticsISBN:9781305251809Author:Jay L. DevorePublisher:Cengage Learning
Statistics for The Behavioral Sciences (MindTap C…StatisticsISBN:9781305504912Author:Frederick J Gravetter, Larry B. WallnauPublisher:Cengage Learning
Elementary Statistics: Picturing the World (7th E…StatisticsISBN:9780134683416Author:Ron Larson, Betsy FarberPublisher:PEARSON
The Basic Practice of StatisticsStatisticsISBN:9781319042578Author:David S. Moore, William I. Notz, Michael A. FlignerPublisher:W. H. Freeman
Introduction 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