Use the negative z table pdf file to determine the probability of a negative z score value. Use the Z score table pdf file to determine the corresponding area or probability to a positive z score value.įor example, the z-score value of 2 indicates it is 2 standard deviations greater than the mean.Ī negative Z score value indicates the raw score value is below the mean of the distribution. The positive Z score value represents the raw score value is higher than the mean of the distribution. The Z-score value either be Positive or Negative depending on raw score value is greater than the mean or less than the mean. The standard score value gives you how far the raw score value is from the mean. The standard normal distribution table is the normal distribution having a mean value of 0 and a standard deviation of 1. In this post, equivalent terms like z-values, standardized variables, and normal scores are used. Standard scores are most commonly called z-scores. Z table or the Z-score table also called the standard normal table is a mathematical table used to find the probability that the z-score value is below, above, or between the values on the standard normal distribution.
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