The average LSAT scores (x) for the 1973 entering classes of 15 American law schools, and the

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The average LSAT scores (x) for the 1973 entering classes of 15 American law schools, and the corresponding grade point averages (y), are as follows.

x: 576 635 558 578 666 580 555 661 651 605 653 575 545 572 594 y: 3.39 3.30 2.81 3.03 3.44 3.07 3.00 3.43 3.36 3.13 3.12 2.74 2.76 2.88 2.96 Using the R function lsfitci, verify that the 0.95 confidence interval for the slope, based on the least squares regression line, is (0.0022, 0.0062).

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