Question: 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.

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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