The table shows an excerpt of a printout for analyzing murder rates (per 100,000) in the United States. The first column describes the crime figure for all 50 states and Washington DC. The second column refers to only the 50 states.
n 51 50
Mean 5.6 4.8
SD 6.05 2.57
Max 44 13
75% Q3 6 6
Median 5 5
25% Q1 3 3
Minimum 1 1
Why are the means and standard deviations so different, but the medians the same for the two data sets?
Of the two statistics which is most affected by outliers, the range or IRQ?