Required information Section 05.02 Exercise 07 - Compute confidence interval; Find necessary sample size In a sample of 100 steel canisters, the mean wall thickness was 8.1 mm with a standard deviation of 0.6 mm. Section 05.02 Exercise 07.d - Compute confidence interval; Find necessary sample size a) How many canisters must be sampled so that a 95% confidence interval will specify the mean wall thickness to within +0.08 mm? (Round up the final answer to the nearest integer.) The number of canisters that must be sampled is 221 b) How many canisters must be sampled so that a 99% confidence interval will specify the mean wall thickness to within +0.08 mm? (Round up the final answer to the nearest integer.) The number of canisters that must be sampled is 388 Find a 95% confidence interval for the mean mass of this type of concrete block. (Round the final answers to three decimal places.) The 95% confidence interval is 38.208 38.392 d); Find a 99% confidence interval for the mean mass of this type of concrete block. (Round the final answers to three decimal places.) The 99% confidence interval is ( 38.178 38.422

A data set includes 103 body temperatures of healthy adult humans having a mean of 98.9 degrees°F and a standard deviation of 0.650.65 degrees°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 98.6degrees°F as the mean body​ temperature? What is the confidence interval estimate of the population mean muμ​?

The quality control manager at a light bulb factory needs to estimate the mean life of a large shipment of light bulbs. The standard deviation is 69 hours. A random sample of 36 light bulbs indicated a sample mean life of 260 hours. Complete parts​ (a) through​ (d) below. Construct a ​99% confidence interval estimate for the population mean life of light bulbs in this shipment. The 99​% confidence interval estimate is from a lower limit of    enter your response here hours to an upper limit of    enter your response here hours. ​(Round to one decimal place as​ needed.)

An automobile manufacturer wants to estimate the mean gasoline mileage that its customers will obtain with its new compact model. How many sample runs must be performed so that the estimate is accurate to within 0.5 mpg at 98% confidence? Assume that ? = 2