| These ages plot as a normal curve, supporting the assumption that they all derive from a single thermal event. |
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| The normal curve approach to inference begins by asserting a null hypothesis that is expressed using population parameters. |
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| The number of counts and measurements for any character usually exceeded 30, and the frequency bar graph associated with this sample number always produced a normal curve. |
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| More descriptively, platykurtic curves tend to be elongated and flat, leptokurtic appear taller and narrow, and mesokurtic curves tend to be bell-shaped like the normal curve. |
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| For example, a rolled towel in the small of the back may help keep the normal curve and distribute stresses correctly, particularly when sitting for prolonged periods. |
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| All changes are gradual and the distribution of each species can be described as a normal curve, with the highest density where the conditions are optimal. |
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