For advertising purposes, the Beef Industry Council needs to estimate the average caloric content of 3-ounce top loin steak cuts. A random sample of 400 pieces gives a sample mean of 212 calories and a sample standard deviation of 38 calories. Give a 95% confidence interval for the average caloric content of a 3-ounce cut of top loin steak. Also give a 98% confidence interval for the average caloric content of a cut.
Answer to relevant QuestionsA transportation company wants to estimate the average length of time goods are in transit across the country. A random sample of 20 shipments gives x-bar = 2.6 days and s = 0.4 day. Give a 99% confidence interval for the ...An accountant wants to estimate the average amount of an account of a service company. A random sample of 46 accounts yields x-bar = $16.50 and s = $2.20. Give a 95% confidence interval for the average amount of an account. According to the Darvas Box stock trading system, a trader looks at a chart of stock prices over time and identifies box-shaped patterns. Then one buys the stock if it appears to be in the lower left corner of a box, and ...According to Fortune, solar power now accounts for only 1% of total energy produced. If this number was obtained based on a random sample of 8,000 electricity users, give a 95% confidence interval for the proportion of users ...A sensitive measuring device should not have a large variance in the errors of measurements it makes. A random sample of 41 measurement errors gives s2 = 102. Give a 99% confidence interval for the variance of measurement ...
Post your question