A researcher is interested in finding a 95% confidence interval for the mean number of times per day that college students text. The study included 81 students who averaged 25.9 texts per day. The standard deviation was 13.6 texts. Round answers to 3 decimal places where possible. a. To compute the confidence interval, which distribution should you use? t-distribution z-distribution b. With 95% confidence the population mean number of texts per day is between 22.941 and 28.589 texts. c. If many groups of 81 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