The probability that a person with certain symptoms has hepatitis is 0.75. the blood test used to confirm this diagnosis gives positive results for 86? % of people with the disease and 5? % of those without the disease. what is the probability that an individual who has the symptoms and who reacts positively to the test actually has? hepatitis?

Arandom sample of 45 observations results in a sample mean of 68. the population standard deviation is known to be 23 a. compute the margin of error at a 959% confidence interval. b. compute the 95% confidence interval for the population mean c. compute the 90% confidence interval for the population mean. d. compute the 75% confidence interval for the population mean