Construct a 90% confidence interval estimate of the proportion of Lipitor users who will report headaches as a side effect.
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- The Harvard school of public health conducted a survey of 2770 adults in the United States to determine the proportion of Americans who own guns. According to the results, injury prevention in 2007 reported that 26 percent of adults own at least one gun. State and estimate the population parameter using point estimate and a 99 percent confidence interval estimate.An article included data from a survey of a random sample of adults living in the United States. Of the 1,300 people who participated in the survey, 700 responded they believe that global climate change is a major threat to the well-being of the United States. USE SALT Use the five-step process for estimation problems (EMC³) to construct a 95% confidence interval for the proportion of adults in the United States who believe that global climate change is a major threat to the well-being of the United States. (Hint: See Example 9.4. Enter your answer using interval notation. Round your numerical values to three decimal places.) 0.556, 0.610 X Interpret the interval. O There is a 95% chance that the mean number of all adults in the United States who believe that global climate change is a major threat to the well-being of the United States is directly in the middle of this confidence interval. O We are 95% confident that the mean number of all adults in the United States who believe that…Stanford University conducted a study of whether running is healthy for men and women over age 50. During the first eight years of the study, 2.9% of the 661 members of the 50-Plus Fitness Association died. We are interested in the proportion of people over 50 who ran and died in the same eight-year period. Construct a 95% confidence interval for the population proportion of people over 50 who ran and died in the same eight-year period.Enter your answer in interval notation.Round your answer to four decimal places.Do not round any intermediate calculations.
- According to a study, the proportion of individuals in which cover their mouths when sneezing is 0.755. From a survey of 147 adults, 129 cover their mouths when sneezing. What test statistic is calcuated for this scenario? mean test z-score p-value null test t-valueA 90% confidence interval for the mean of airline reservations being canceled on the day of the flight is between 2.68 and 9.42 reservations. What is the point estimate of the mean of reservations that are canceled on the day of the flight?In a test of the effectiveness of garlic for lowering cholesterol, 49 subjects were treated with garlic in a processed tablet form. Cholesterol levels were measured befor and after the treatment. The changes (before - confidence interval estimate of the mean net change in LDL cholesterol after the garlic treatment. What does the confidence interval suggest about the effectiveness a garlic in reducing LDL cholesterol? after) in their levels of LDL cholesterol (in mg/dL) have a mean of 5.2 and a standard deviation of 19.8. Construct a 95° Click here to view a t distribution table. Click here to view page 1 of the standard normal distribution table. Click here to view page 2 of the standard normal distribution table. What is the confidence interval estimate of the population mean u? mg/dL <µAccording to the Government Accountability Office (GAO), women comprise of about 17% of the active dutymilitary. In a random sample of 500 recent graduates who enlisted in the military, 100 were women. Construct a95% confidence interval for the proportion of women who currently enlist in the military, and determine whether ornot this proportion is significantly different from the proportion reported by the GAO at the = 0.05 level.A crossover trial is planned to evaluate the impact of an educational intervention program to reduce alcohol consumption in patients determined to be at risk for alcohol problems. The plan is to measure alcohol consumption (the number of drinks on a typical drinking day) before the intervention and then again after participants complete the educational intervention program. How many participants would be required to ensure that a 95% confidence interval for the mean difference in the number of drinks is within 2 drinks of the true mean difference? Assume that the standard deviation of the difference in the mean number of drinks is 6.7 drinks. Z= ________ s= ________ E = ________ n= ________In a survey of 310 U.S. adults, 39% said that their favorite sport to watch is football. Construct a 99% confidence interval for estimating the population proportion of U.S. adults who say that their favorite sport to watch is football. Give your answers accurate to three decimals.The article “Statistical Modeling of the Time Courseof Tantrum Anger” (Annals of Applied Stats, 2009:1013–1034) discussed how anger intensity in children’s tantrums could be related to tantrumduration as well as behavioral indicators such asshouting, stamping, and pushing or pulling. The followingfrequency distribution was given (and alsothe cor responding histogram):02,2 : 136 22,4: 92 42,11: 71112,20: 26 202,30: 7 302,40: 3Draw the histogram and then comment on any interestingfeatures.Results from the National Health and Nutrition Examination Survey (NHANES) conducted thirty years ago revealed that out of 378 randomly selected adults in the United States 57 were considered to be obese. In this year’s National Health and Nutrition Examination Survey, out of 426randomly selected adults in the United States 135 were considered to be obese. Use the results of the National Health and Nutrition Examination Survey and a 99% confidence interval to estimate the difference between the percentages of adults in the United States that are obese this year and thirty years ago. Express the estimate both symbolically and verbally.Apple Computer believed that 36 percent of its smartphone customer own the most recent model of iPhone (Ho). To test this hypothesis, it gathered customer data using a CRM software. The results indicated that only 30 percent of the iPhone users owned iPhone 11, the most recent model. Assume that this percentage value was based on a sample of 300 users. Test its hypothesis using 95% confidence level.SEE MORE QUESTIONSRecommended textbooks for youMATLAB: An Introduction with ApplicationsStatisticsISBN:9781119256830Author:Amos GilatPublisher:John Wiley & Sons Inc
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