1) Using the Empirical Rule, in a normal distribution what percentage of values would fall into an interval of 2.08 to 23.92 where the mean is 13 and standard deviation is 5.46? Please format to 3 decimal places.

2) Calculate the 50thpercentile for the data below.

91, 53, 71,4, 30, 16, 16, 16, 4

3) Calculate the z score for number of errors x = 60 errors. Use this sample data.

56, 52, 51, 16, 29, 78