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Solution: Find the z-score in the table below. Most beginning statistical textbooks include this Z-Score Table, and this site will be using this format.Įxample 1: Find the probability that a variable has a z-score of less than 0.36. This table lists both positive and negative z-scores. This table works with the entire area under the normal curve, and requires less adjustments than the first option. These tables are usually labeled "cumulative from the left". Another form of the table yields probability or area starting from negative infinity (the farthest left) and going to the right up to the needed z-score. This type of table lists positive z-scores only.Ģ. This table basically works with half of the area under the normal curve, and the user must take this into consideration and make adjustments when using this table. These tables are usually labeled "cumulative from mean". One form of the table yields probability or area starting at the mean and going to the right of the mean up to the needed z-score. Consider these two most popular formats:ġ. Z-Score Tables come in different formats, determined by where the computations were started. Each value in the body of the table is a cumulative area.
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