Question: Let y1, y2, . . . , yn be a random sample from an unknown distribution and qi = ^1 ( 1/n (i 1/2 ))

Let y1, y2, . . . , yn be a random sample from an unknown distribution and qi = ^1 ( 1/n (i 1/2 )) for i = 1, 2, . . . , n where (z) is the CDF of N(0, 1).

describe (i) how to construct the normal probability plot using the yi's and the qi's, and (ii) how to interpret this plot.

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