Unformatted text preview: Figure 2). For example, the amount of curve area between one standard deviation above the mean and one standard deviation below is 0.3413 + 0.3413 = 0.6826, which means that approximately 68.26 percent of the values lie in that range. Similarly, about 95 percent of the values lie within two standard deviations of the mean, and 99.7 percent of the values lie within three standard deviations. Figure 2. The normal curve and the area under the curve between units. σ...
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 Fall '08
 Mendez
 Standard Deviation

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