B myopenmath.com 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 35.4 minutes concentrating on their professor during the hour lecture. The standard deviation was 13.6 minutes. Round answers to 3 decimal places where possible. a. To compute the confidence interval use a ? 3 distribution. b. With 98% confidence the population mean minutes of concentration is between [:] and Dminutes. c. If many groups of 1 10 randomly selected members are studied, then a different confidence interval would be produced from each group. About C] percent ofthese 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 E'T' Video E\"? [+] Calculator Soratohwork Area