Chapter 8 Confidence Intervals (Mean) Due Sunday by 11:59pm Points 13, Submitting an external tool Chapter 8 Confidence Intervals (Mean) Score: 0/14 0/14 answered Question 9 A researcher is interested in finding a 98% confidence interval for the mean number minutes students are concentrating on their professor during a one hour statistics lecture. The study included 110 students who averaged 32.8 minutes concentrating on their professor during the hour lecture. The standard deviation was 11.4 minutes. a. To compute the confidence interval use a ?v distribution. b. With 98% confidence the population mean minutes of concentration is between (round to 3 decimal places) and minutes. c. If many groups of 110 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 mean minutes of concentration and about percent will not contain the true population mean minutes of concentration." Hint: Hints Video El Textbook Question Help: Message instructor Submit