Question: Calculating percentiles based on the Z table is only appropriate for observations that come from a nearly normal distribution. The z fcore for the median

Calculating percentiles based on the Z table is only appropriate for observations that come from a nearly normal distribution. The z fcore for the median of a symmetric distribution is approximately 0. Z scores are defined for observations from distributions of any shape and skew. The Z score for the median of a left skewed distribution is negative

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