answer both questions thank you

You work for a soft drink company in the quality control division. You are interested in the standard deviation of one of your production lines as a measure of consistency. The product is intended to have a mean of 12 ounces, and your team would like the standard deviation to be as low as possible. You gather a random sample of 16 containers. Estimate the population standard deviation at a 98% level of confidence. 11.89 11.97 11.93 12.01 11.89 11.98 12.04 11.96 11.99 12.06 11.98 11.93 11.98 12.05 11.93 11.97 (Data checksum: 191.56) Note: Keep as many decimals as possible while making these calculations. If possible, keep all answers exact by storing answers as variables on your calculator or computer. a) Find the sample standard deviation: b) Find the lower and upper x" critical values at 98% confidence: Lower: Upper: c) Report your confidence interval for a: (.> Submit Question . Question 2 Go/ pt 0 5 2 99 0 Details A fitness center is interested in finding a 98% confidence interval for the standard deviation of the number of days per week that their members come in. Records of 24 members were looked at and the standard deviation was 2.9. Use 3 decimal places in your answer. a. To compute the confidence interval use a | Select an answer ) distribution. b. With 98% confidence the population standard deviation number of visits per week is between and visits. c. If many groups of 24 randomly selected members are studied, then a different confidence interval would be produced from each group. About percent of these confidence intervals will contain the true population standard deviation number of visits per week and about percent will not