Question

What is the frequency distribution of a variable? What are the Stata commands for creating a...

What is the frequency distribution of a variable?
What are the Stata commands for creating a bar chart that displays the number of cases (or the percentage of cases) in which the variable region takes each of its possible values?
What does it mean for a distribution to be called symmetric or asymmetric?
What does it mean for a distribution to be skewed to the right or skewed to the left?

Math   Statistics-And-Probability   
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Answer #1

Frequency distribution of a variable is the table of count or the number of times each variable appears. For eg: If we consider a discrete distribution as follows: 2,3,4,3,2,2,4. Then we have the variables 2,3,4 the frequency of each of them are 3,2,2 respectively. Frequency distributions are displayed graphically using bar/column charts or histograms to make the presentation easily interpretable.

A distribution is symmetrical if it's skewness is 0 ie mean=median=mode for that distribution.

A distribution is assymetrical if it's skewness is not 0. It can be left skewed or right skewed.

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