![]() For example, if the mean of a normal distribution is five and the standard deviation is two, the value 11 is three standard deviations above (or to the right of) the mean. A z-score is measured in units of the standard deviation. Z Score: A Z score, also known as a standard score, measures the number of standard deviations an observation or data point is from the mean of a distribution. The standard normal distribution is a normal distribution of standardized values called z-scores. STANDARD NORMAL DISTRIBUTION: Table Values Re resent AREA to the LEFT of the Z score. Recognize the standard normal probability distribution and apply it appropriately. ![]()
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