Why is a z-score range -3 to 3 if a normal distribution is

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Why is a z-score range -3 to +3? If a normal distribution is not assumed, can a z-score still be used? Why or why not?

Reference no: EM13610576

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Why is a z-score range -3 to 3 if a normal distribution is : why is a z-score range -3 to 3? if a normal distribution is not assumed can a z-score still be used? why or why
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