Samples of size n = 70 are randomly selected from the population of numbers (0 through 9) produced by a random-number generator,
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You just average the x and y. So for x it is (3+-5)/2 = -1 and for y it is (8+-1)/2=3.5.
The midpoint is (-1,3.5). See picture for a graphical explanation.
The midpoint is (-1,3.5). See picture for a graphical explanation.
