Possible GELO Artifact The stem-and-leaf plot below shows the marathon training times (in minutes) for a random sample of 30 female runners. Training Times (in minutes) of Female Runners 17 8 9 9 Key: 17 8 = 178 18 0 0 0 012 3 4 6 6 7 9 19 0 0 0 3 5 6 6 20 0 0 1 2 3 Provided the data from the stem-and-leaf plot above answer the following questions. 1. Use the sample to find a point estimate (round to 2 DP) for the mean training time of the female runners. 2. Find the sample standard deviation (round to 2 DP) of the training time for the female runners. 3. Use the sample to construct a 95% confidence interval for the population mean training time of the female runners. 4. Interpret the result of Exercise 3. Write in complete sentences. 5. A trainer wants to estimate the population mean training time for female runners within 2 minutes. Determine the minimum sample size required to construct a 99% confidence interval for the population mean training time of female runners. Assume the population standard deviation is 8.4 minutes