#15

Progress saved Done & Via@) . @ Question 15 v & 0/1 pt O 2 @ Details A researcher is interested in finding a 90% confidence interval for the mean number minutes students are concentrating on their professor during a one hour statistics lecture. The study included 102 students who averaged 39.8 minutes concentrating on their professor during the hour lecture. The standard deviation was 13.2 minutes. Round answers to 3 decimal places where possible. a. To compute the confidence interval usea 2 distribution. b. With 90% confidence the population mean minutes of concentration is between :' and c. If many groups of 102 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 C] percent will not contain the true population mean minutes of concentration