FIGURE 7-
Calculating a Score from a Percentile
We convert a percentile to a raw score by calculating the percentage between the mean and the z score, and then looking up that percentage on the z table to find the associated z score. We then convert the z score to a raw score using the formula. Here, we look up 13.00% on the z table (12.93% is the closest percentage) and find a z score of 0.33, which we can convert to a raw score.
Calculating a Score from a Percentile
We convert a percentile to a raw score by calculating the percentage between the mean and the z score, and then looking up that percentage on the z table to find the associated z score. We then convert the z score to a raw score using the formula. Here, we look up 13.00% on the z table (12.93% is the closest percentage) and find a z score of 0.33, which we can convert to a raw score.