Score: 0/24 076 answered Question 1 0/5 pts 9 10 $ 4 0 Details ements 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 32 students who averaged 42.8 minutes concentrating on their professor during the hour lecture. The standard deviation was 12.4 minutes. Round answers to 3 decimal places where possible. nts a. To compute the confidence interval use a (? ) distribution. b. With 90% confidence the population mean minutes of concentration is between and minutes. c. If many groups of 32 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. Question Help: Message instructor Submit Question .Question 2 0/5 pts 10 # 4 0 Details A researcher is interested in finding a 98% confidence interval for the mean number of times per day that college students text. The study included 31 students who averaged 33.2 texts per day. The standard deviation was 24.9 texts. Round answers to 3 decimal places where possible. a. To compute the confidence interval use a (? ) distribution. b. With 98% confidence the population mean number of texts per day is between and texts . c. If many groups of 31 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 number of texts per day and about percent will not contain the true population mean number of texts per day. Question Help: Message instructor Submit Question Question 3 0/5 pts 9 10 ~ 4 @ Details A psychiatrist is interested in finding a 98% confidence interval for the tics per hour exhibited by children with Tourette syndrome. The data below show the tics in an observed hour for 10 randomly selected children with Tourette syndrome. Round answers to 3 decimal places where possible. 1 9 9 5 4 10 8 3 7 6 a. To compute the confidence interval use a (? V ) distribution. b. With 98% confidence the population mean number of tics per hour that children with Tourette syndrome exhibit is between and c. If many groups of 10 randomly selected children with Tourette syndrome are observed, then a different confidence interval would be produced from each group. About |percent of these confidence intervals will contain the true population mean number of tics per hour and about percent will not contain the true population mean number of tics per hour