Here is a sample data set. 207.7 258 262.7 274.7 229 255.7 277.6 290.5 342.4 395.2 406.5 426.2 455.7 462.5 432.1 432.1 432.1 454.7 494.8 465.7 487.9 495 500.7 512.5 515.6 530.7 539.8 539.8 542 547.4 551 551.5 555.2 557.4 561.2 563.9 576.2 576.9 579.9 581.7 581.7 581.7 593.1 597.8 627 632.2 657.8 661.7 723.5 790.1 829.7 865.9 751 754.1 2005000500050005000500050025000 length (cm) Find the first quartile for this data set. Q₁ = Find the third quartile for this data set. ++ 4286 14 12 10 64

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A: Introduction - Mean or average = Sum of observations total number of observations

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