Parametric statistics are based on the assumption that the data in the study are drawn from a population with a normal (bell-shaped)distribution and/or normal sampling distribution.

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Parametric statistics rely on the assumption that the data follows a normal distribution, which is represented by a bell-shaped curve. This also applies to the sampling distribution, which is the distribution of sample means. Non-parametric statistics, on the other hand, do not require this assumption and can be used with data that may not follow a normal distribution.

Parametric Statistics Are Based on the Assumption That the Data