Below is a sample quantitative data set. 457.8 386.6 302.3 399.5 425.7 474.9 293.9 392.2 459.1 416.9 387.4 400.7 388.4 414.1 431.9 374 480.6 516.5 481.4 401 401 420.9 439.4 439.4 439.4 383.9 291.4 484.6 352 517.4 383.7 382.5 514.5 383.7 431.2 386.2 386.3 420 386.9 422.4 409 433 344.3 369.1 503.5 511.4 315.1 289 383.7 326.3 431 392 291.3 467.4 a. Find the first quartile for this data set. Q₁ = b. Find the third quartile for this data set. Q3= = c. Find the interquartile range for this data set. IQR =

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