What's so special about the Normal Curve
{"Image DocumentName": "What\u2019s so special about the Normal Curve?", "Image ImageDescription": "The normal curve is a symmetrical distribution of scores with an equal number of scores above and below the midpoint of the abscissa (the horizontal axis, or \u2018x-axis\u2019, for the curve). Since the distribution of scores is symmetric, the mean, median, and mode are all at the same point on the abscissa. In other words, the mean = the median = the mode. If we divide the distribution up into standard deviation units, a known proportion of scores lies within each portion under the curve. From published or online tables, we can find the proportion of scores above and below any point on the abscissa, expressed in standard deviation units. Scores expressed in standard deviation units, are referred to as Z-scores. 34% of cases are between the mean and one SD away.", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}