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In the axolotl, development is altered. Adult axolotls retain features (external gills and aquatic life) that were juvenile in its ancestors, a phenomenon known as
Mean
The arithmetic average of a set of numbers, calculated by adding all the numbers and dividing by the count.
Standard Normal Curve
A bell-shaped curve that is symmetric about the mean, showing the distribution of a standard normal variable where the mean is zero and the standard deviation is one.
Z-score
A statistic that measures the distance of a single data point from the mean, expressed in units of standard deviation.
Percentile
A statistical measure indicating the value below which a given percentage of observations in a group falls.
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