Match the vocabulary word to its correct definition. 1. bell curve A set of numbers that are related. 2. data set A graph that represents data in groups. It is similar to a bar graph, but unlike in a bar graph, there is no spacing between the columns that represent the data. 3. histogram How spread out the values in a data set are from the mean. 4. mean A symmetrical bell shaped curve that represents the distribution of a set of values. Also called normal distribution. 5. normal distribution Average of all numbers in a data set. 6. standard deviation See also, bell curve. Symmetrical distribution of data. 7. variance A value that represents how far apart the figures in a data set are from the average. A low deviation indicates the figures are very close in value to the average. A high deviation indicates the figures are far apart in value from the average.