Using the standard normal distribution, find the two z-scores that that form the middle shaded region of 20%. The shaded region is symmetric about z = 0. Use technology and round your z-scores to at least 4 decimal places. -4 Shaded Area = 0.2 -3 -2 -1 Negative z-score = Positive z-score = -Z 0 N N 1 2 3 4

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