A recent study of 2700 children randomly selected found 21% of them deficient in vitamin D. Construct the 98% confidence interval for the true proportion of children who are deficient in vitamin D.
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- study of 420,077 cell phone users found that 133 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 0.0236% 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.In a trial of 350 patients who received 10-mg doses of a drug daily, 49 reported headache as a side effect. Construct a 90% confidence interval for the population proportion of patients who receive the drug and report headache as a side effect.A random survey of 5000 businesses was conducted by Statistics Canada. They reported an average of 8.98 bankruptcies per 1000 businesses from 1999 to 2005 with a standard ERROR of 1.25. Construct a 95% confidence interval for the mean number of bankruptcies per 1000 businesses between 1999 and 2005.
- A simple random sample of 36 8th graders at a large suburban middle school indicated that 84% of them are involved with some type of after school activity. Find the 95% confidence interval that estimates the proportion of them that are involved in an after school activity.A recent provincial report states that 90% of the population is aware that piercings as well as tattoos can transmit infectious disease. A survey was conducted in the province and random subjects were asked if they knew that piercings as well as tattoos could transmit an infectious disease. Following this, 1450 people responded with "yes" and 48 responded with "no". Find the 95% confidence interval estimate of the proportion of those who know that piercings as well as tattoos can transmit an infectious disease.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 clinical trial is conducted comparing a new pain reliever for arthritis to a placebo. Participants are randomly assigned to receive the new medication or a placebo. The outcome is pain relief within 30 minutes. Generate a 95% confidence interval for the proportion of patients on the new medication who report paint relief. Generate a 95% confidence interval for the difference in proportions of patients who report pain relief. Pain Relief No Pain Relief New Medication 44 76 Placebo 21 99A 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. %After surveying a random sample of 300 students in an online degree program, 86% believed that their classes were worth the cost they were paying. The results from a survey of 345 randomly selected students who were in a face-to-face degree program who had also taken some online courses, showed that 84% of them believed those online courses were worth the cost. Construct a 90% confidence interval for the difference between the two groups of students.Recommended textbooks for youMATLAB: An Introduction with ApplicationsStatisticsISBN:9781119256830Author:Amos GilatPublisher:John Wiley & Sons Inc
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