A researcher is interested in finding a 99% confidence interval for the mean number of times per day that college students text. The study included 131 students who averaged 28.2 texts per day. The standard deviation was 14.2 texts. Round answers to 3 decimal places where possible. a. With 99% confidence the population mean number of texts per day is between texts. and b. If many groups of 131 randomly selected members are studied, then a different confidence interval would be produced from each group. About the true population number of texts per day and about population mean number of texts per day. percent of these confidence intervals will contain percent will not contain the true