PSY 201 Chapter Notes - Chapter 3: Raw Score, Standard Score, Standard Deviation
23 Sep 2018
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Z score - the number of standard deviations the actual score is above or below the mean. If the actual score is above the mean, the z score is positive. If the actual score is below the mean, the z score is negative. Raw score - an ordinary score as opposed to a z score. Formula to change raw score to z score. Example: jacob spoke to children 8 times in an hour (mean = 12 and sd = 4) (z score = raw score minus the mean, divided by the standard deviation). Z = (8-12)/4 = -4/4 = -1. Jacob has a z score of -1, so a score of 8 is 1 sd below m. Figure out the deviation score: subtract the mean from the raw score. Figure out the z score: divide the deviation score by the standard deviation. Formula to change z score to raw score.
