Determine the t-score for a 95% confidence interval for a population mean from a sample of size 6. t = [three decimal accuracy]
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Determine the t-score for a 95% confidence interval for a population mean from a
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- n a test of the effectiveness of garlic for lowering cholesterol, 42 subjects were treated with garlic in a processed tablet form. Cholesterol levels were measured before and after the treatment. The changes (before-after) in their levels of LDL cholesterol (in mg/dL) have a mean of 4.4 and a standard deviation of 18.6. Construct a 99% confidence interval estimate of the mean net change in LDL cholesterol after the garlic treatment. What does the confidence interval suggest about the effectiveness of garlic in reducing LDL cholesterol? Click here to view at 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/dLA data set includes 108 body temperatures of healthy adult humans having a mean of 98.2°F and a standard deviation of 0.65°F. Construct a 99% confidence interval estimate of the mean body temperature of all healthy humans. What does the sample suggest about the use of 98.6°F as the mean body temperature? What is the confidence interval estimate of the population mean μ? ____°F<μ<_____°F (Round to three decimal places as needed.)Determine the sample size necessary to estimate a population mean within 1 with 90% confidence given that the population standard deviation is 10.Private colleges and universities rely on money contributed by individuals and corporations for their operating expenses. much of this money is invested in a fund called an endowment, and the college spends only the interest earned by the fund. A recent survey of eight private colleges in the United States resulted in the following summary statistics for their endowments(in millions of dollars) x̅ = 180.975 and s =143.042. Calculate a 99% confidence interval for the mean endowment of all private colleges in the United States.10 K In a test of the effectiveness of garlic for lowering cholesterol, 50 subjects were treated with garlic in a processed tablet form. Cholesterol levels were measured before and after the treatment. The changes (before-after) in their levels of LDL cholesterol (in mg/dL) have a mean of 4.6 and a standard deviation of 16.6. Construct a 99% confidence interval estimate of the mean net change in LDL cholesterol after the garlic treatment Click here to view at 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 <μA study was conducted to measure the effectiveness of hypnotism in reducing pain. The measurements are centimete on a pain scale before and after hypnosis. Assume that the paired sample data are simple random samples and that th differences have a distribution that is approximately normal. Construct a 95% confidence interval for the mean of the "before - after" differences. Does hypnotism appear to be effective in reducing pain? Before After 4.8 6.3 2.4 2.6A sample of twenty newborn elephants had a sample mean of 225 pounds and a sample standard deviation of 15 pounds. However, it is known that the standard deviation for the population (sigma) is actually 18 pounds. Construct a 90% confidence interval for the weight of newborn elephants. Lower_______pounds Upper_______pounds Is it best to use a Z-interval or a T-interval?In a random sample of 23 people, the mean commute time to work was 31.3 minutes and the standard deviation was 7.3 minutes. Assume the population is normally distributed and use a t-distribution to construct a 98% confidence interval for the population mean . What is the margin of error of u? Interpret the results. The confidence interval for the population mean u is ( (Round to one decimal place as needed.) The margin of error of u is (Round to one decimal place as needed.) Interpret the results. O A. If a large sample of people are taken approximately 98% of them will have commute times between the bounds of the confidence interval. O B. It can be said that 98% of people have a commute time between the bounds of the confidence interval. O C. With 98% confidence, it can be said that the population mean commute time is between the bounds of the confidence interval. O D. With 98% confidence, it can be said that the commute time is between the bounds of the confidence interval. Click to…I need help with this questionconstruct the confidence interval for the population mean c= 0.90 x=5.1 standard deviation = 0.9 n=40Assume that a sample is used to estimate a population mean μμ. Find the 95% confidence interval for a sample of size 63 with a mean of 49.8 and a standard deviation of 5.5. Enter your answer as an open-interval (i.e., parentheses) accurate to 3 decimal places.Construct a confidence interval for the A) population variance and the b) population standard deviationSEE MORE QUESTIONSRecommended textbooks for youMATLAB: An Introduction with ApplicationsStatisticsISBN:9781119256830Author:Amos GilatPublisher:John Wiley & Sons Inc
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