What is standard deviation in test scores? What would a small standard deviation indicate?Ī low standard deviation indicates that the values tend to be close to the mean (also called the expected value) of the set, while a high standard deviation indicates that the values are spread out over a wider range. When the standard deviation is large, the curve will be short and wide in spread. ![]() When the standard deviation is small, the curve will be tall and narrow in spread. ![]() The center of the graph is the mean, and the height and width of the graph are determined by the standard deviation. How do you know if standard deviation is small or large? A standard deviation close to zero indicates that data points are close to the mean, whereas a high or low standard deviation indicates data points are respectively above or below the mean. Low standard deviation means data are clustered around the mean, and high standard deviation indicates data are more spread out. ![]() What is considered a high and low standard deviation?
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