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Figure 3: Frequency distribution polygon showing the distribution and frequency of the four higher orders studies in group 1 (Arab origin) and group 2 (South Asian origin). (a) For 3^{rd} order, (b) for 4^{th} order, (c) for 5^{th} order, and (d) for 6^{th} order. The root mean square magnitude scale is similar for the four graphs in order to demonstrate their mean spreads with respect to each other 
