1. Given a datasetX=[1,2,3,4,5], calculate the mean, variance and standard deviation.
2. Given a datasetX=[5,1,65,4,3,5], calculate the median.
3. Without calculating, what is the standard deviation of the datasetX=[1,1,1,1,1]?
4. Given a datasetX=[5,4,6,3,4,25,7,6,3,1,2], calculate the mean and median. Now remove any data points you think are outliers and recalculate the mean and median.