AP Stat 2.1 Vocab.
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Created by:
MelissaPuntkattalee on August 24, 2010
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10 terms
Terms | Definitions |
|---|---|
 Density Curve | is always on or above the horizontal axis AND has an area of exactly 1 underneath it (idealized) |
| Median of a density curve | the equal-areas point, the point with half the area under the curve to its left and the other half of the area to its right |
| Mean of a density curve | the point at which the curve would balance if made of solid material |
| simulation | imitate the appearance or character of |
| Frequency Histogram | a histogram that plots the number of times each outcome occurs |
| Normal Curve | these curves are symmetric, single-peaked, and bell-shaped |
| Normal distributions | describe a normal curve using mean and its standard deviation |
| Inflection point | the point at which the shape of the curvature changes (from falling steeply to not as steeply); this point is located at a distance σ (standard deviation) on either side of the mean μ |
| 68-95-99.7 Rule | In the normal distribution with mean μ and standard deviation σ: 1) 68% of the observations fall within σ of the mean μ. 2)95% of the observations fall within 2σ of μ. 3) 99.7% of the observations fall within 3σ of μ |
| percentile | the percent of the distribution that is at or to the left of the observation |
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