Distribution Shapes

由直方图到 smooth curve

 

1.this distribution of heights is bell shaped(or mound shaped), but the smooth curve makes seeing the shape a little easier.

2.need not worry about minor differences in shape全局),allows us to classify most distributions by designating

A distribution is unimodal if it has one peak; bimodal if it has two peaks; and multimodal if it has three or more peaks

Symmetricare mirror images of one another

Key:Distinguishing between data for an entire populationcensus data. and data for a sample of a population is an essential aspect of statistics.

 

The distribution of population data =the distribution of the variable

 

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