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12) Constructing a confidence interval You must show your work for credit. To show your work 1- Clearly stated the confidence level, sample size, and point statistic - If you used technology such as Excel or a TI-84 calculator to generate the confidence interval please attach a picture or write out the commands you entered into the calculator. 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 114 students who averaged 34.7 minutes concentrating on their professor during the hour lecture. The standard deviation was 10.1 minutes. Round answers to 3 decimal places where possible. a. To compute the confidence interval use a distribution. b. With 98% confidence the population mean minutes of concentration is between [3 and [:3 minutes. crlf many groups of 114 randomly selected members are studied, then a different confidence interval would be produced from each group. About [3 percent of these confidence intervals will contain the true population mean minutes of concentration and about D percent will not contain the true population mean minutes of concentration