1000 health practitioners in Zambia were surveyed during the COVID-19 outbreak, of these 380 of them though the Virus was not caused by people not wearing face masks. Find the margin or error for a 90% confidence interval with a critical value of 1.645
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1000 health practitioners in Zambia were surveyed during the COVID-19 outbreak, of these 380 of them though the Virus was not caused by people not wearing face masks. Find the margin or error for a 90% confidence interval with a critical value of 1.645
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- A study based on a random sample of 10 U.S. female adults reported a sample mean height of 65 inches with a sample standard deviation of 4 inches. Calculate a 90% Confidence interval for the population mean μ height of US adult women. What is the margin of error of the 90% confidence interval? Interpret the 90% confidence interval.A clinical trial was conducted to test the effectiveness of a drug used for treating insomnia in older subjects. Before treatment 15 subjects had a mean wake time of 100.0 min. After treatment, the 15 subjects had a mean wake time of 95.7 min and a standard deviation of 20.4 min. Assume that the 15 sample values appear to be from a normally distributed population and construct a 90% confidence interval estimate of the mean wake times for a population with the drug treatments. What does the result suggest about the mean wake time 100.0 min before the treatment? Does the drug appear to be affective.a data set includes 109 body temperatures of healthy adult humans having a mean of 98.3 f and a standarddeviationn of 0.54F construct a 99% confidence interval estimate of the human body temperature of all healthy humans. What does the sample suggest about the use of 98.6 F as the mean body temperature?
- A clinical trial was conducted to test the effectiveness of a drug for treating insomnia in older subjects. Before treatment, 24 subjects had a mean wake time of 104.0 min. After treatment, the 24 subjects had a mean wake time of 98.2 min and a standard deviation of 23.3 min. Assume that the 24 sample values appear to be from a normally distributed population and construct a 95% confidence interval estimate of the mean wake time for a population with drug treatments. What does the result suggest about the mean wake time of 104.0 min before the treatment? Does the drug appear to be effective? Construct the 95% confidence interval estimate of the mean wake time for a population with the treatment. min < µ< min (Round to one decimal place as needed.) Enter your answer in the edit fields and then click Check Answer. ? 1 part remaining Clear All Check AnswerA clinical trial was conducted to test the effectiveness of a drug for treating insomnia in older subjects. Before treatment, 16 subjects had a mean wake time of 103.0 min. After treatment, the 16 subjects had a mean wake time of 94.3 min and a standard deviation of 21.5 min. Assume that the 16 sample values appear to be from a normally distributed population and construct a 99% confidence interval estimate of the mean wake time for a population with drug treatments. What does the result suggest about the mean wake time of 103.0 min before the treatment? Does the drug appear to be effective? Construct the 99% confidence interval estimate of the mean wake time for a population with the treatment.A clinical trial was conducted to test the effectiveness of a drug for treating insomnia in older subjects. Before treatment, 17 subjects had a mean wake time of 103.0 min. After treatment, the 17 subjects had a mean wake time of 97.9 min and a standard deviation of 23.6 min. Assume that the 17 sample values appear to be from a normally distributed population and construct a 95% confidence interval estimate of the mean wake time for a population with drug treatments. What does the result suggest about the mean wake time of 103.0 min before the treatment? Does the drug appear to be effective? Construct the 95% confidence interval estimate of the mean wake time for a population with the treatment. min < µ< min (Round to one decimal place as needed.)
- A clinical trial was conducted to test the effectiveness of a drug for treating insomnia in older subjects. Before treatment, 14 subjects had a mean wake time of 103.0 min. After treatment, the 14 subjects had a mean wake time of 75.4 min and a standard deviation of 24.4 min. Assume that the 14 sample values appear to be from a normally distributed population and construct a 99 % confidence interval estimate of the mean wake time for a population with drug treatments. What does the result suggest about the mean wake time of 103.0 min before the treatment? Does the drug appear to be effective? Construct the 99 % confidence interval estimate of the mean wake time for a population with the treatment. nothing minless than muless thannothing min (Round to one decimal place as needed.) What does the result suggest about the mean wake time of 103.0 min before the treatment? Does the drug appear to be effective? The confidence interval ▼…A clinical trial was conducted to test the effectiveness of a drug for treating insomnia in older subjects. Before treatment, 23 subjects had a mean wake time of 105.0 min. After treatment, the 23 subjects had a mean wake time of 80.5 min and a standard deviation of 22.3 min. Assume that the 23 sample values appear to be from a normally distributed population and construct a 95% confidence interval estimate of the mean wake time for a population with drug treatments. What does the result suggest about the mean wake time of 105.0 min before the treatment? Does the drug appear to be effective? Construct the 95% confidence interval estimate of the mean wake time for a population with the treatment. ] min < µAn electrical firm manufactures light bulbs that have a length of life that is appropriately normally distributed with a standard deviation of 40 hours. If a sample of 30 bulbs has an average life of 780 hours, find a 99% confidence interval for the population mean of all bulbs produced by this firm.A clinical trial was conducted to test the effectiveness of a drug for treating insomnia in older subjects. Before treatment, 23 subjects had a mean wake time of 102.0 min. After treatment, the 23 subjects had a mean wake time of 77.3 min and a standard deviation of 20.7 min. Assume that the 23 sample values appear to be from a normally distributed population and construct a 90% confidence interval estimate of the mean wake time for a population with drug treatments. What does the result suggest about the mean wake time of 102.0 min before the treatment? Does the drug appear to be effective?The CDC has asked for your help interpreting their data on COVID-19. From a sample of 64 patients, you find the average time for a person showing symptoms to recover is 21 days. The CDC reported a standard deviation of 6 days. For a 90% confidence level, what is the upper bound in days of the confidence interval for a sick patient to recover?Researchers want to test a new hand exercise plan for arthritis patients to see if they have improved flexibility. They recruited 110 patients with arthritis in their hands and randomly assigned them to one of two treatment groups: group i took their regular medicine and did the new hand exercises; and group 2 only took medicine. After one month, 42 of the 55 in group 1 improved in their flexibility, and 37 of the 55 in group 2 improved their flexibility. Based on the 95% confidence interval (-0.076, 0.258), is there convincing evidence of a difference in the proportion of patients like these who would show improvement in flexibility if they did the new hand exercises along with taking the medicine versus just taking the medicine? v to believe there va difference in the proportion of patients like these who would show improvement in flexibility if they did the new hand exercises along with taking the medicine versus just taking the medicine. Because v contained in the interval, there…SEE MORE QUESTIONS