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Why are there no negative z-scores on the z-table? Oz-scores cannot be negative because the unit normal distribution is symmetrical, each z-score shown can
Why are there no negative z-scores on the z-table? Oz-scores cannot be negative because the unit normal distribution is symmetrical, each z-score shown can be either positive or negative O z-scores can be negative, but since standard deviation cannot be negative, the negative z-scores are just theoretical O negative z-scores are not on the table because the negative z-scores all have areas in the tail that are less than .001
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