Find the IQR

What will be an ideal response?

To find the IQR, we must obtain the 1st and 3rd quartiles. The 1st quartile Q1 is located in the 0.25(25 + 1 )th ordered position = 6.5th ordered position. Thus, Q1 = (669 + 672 )/2 = 670.50. The 3rd quartile is located in the 0.75(25 + 1 )th ordered position = 19.5th ordered position. Thus, Q3 = (705 + 706 )/2 = 705.5. Therefore IQR = 705.5 - 670.5 = 34.5.

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