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Table of Contents

 


 

Univariate Descriptive Statistics

Univariate descriptive statistics are used to describe one variable through the creation of a summary statistic. 

Ratios

 

Measures the extent to which one category of a variable outnumbers another category in the same variable.

 

Ratio = f1/f2  or frequency in one group (larger group) divided by the freq in another group.

 

Ratio Example:           1370 Protestants and 930 Catholics

1370/930 = 1.47 or for every one Catholic there are 1.47 Protestants in the given population.

 

 

Rates

 

Measures number of actual occurrences out of all possible occurrences per an established period of time.

 

Rate Example:  Create death rate per 1000 given there are 100 deaths a year in a population of 10,000

 

Rate Formula

 

 

 

No. Per Year

X

1000

Population

Rate Formula

 

 

 

100

X

1000

10,000

10 deaths per 1000 people

 

 

Proportions

Proportions are a common method used to describe frequencies as they compare to a total (relative frequencies).  A proportion weights the frequency of occurrence against the total possible.  It is often reported as a percentage.

 

Proportion Formula

 

Occurrence

Total

Percent Formula

 

 

 

Occurrence

X

100

Total

Software Output Example


 
Google

 


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