Frequency Distribution Table for Car Sales

Study Notes

A car dealership owner wants to know which of the four car types - minivans, SUVs, convertibles, and electric vehicles - sold the most in the past month.

The question can be answered by constructing this.
It's a data summary, usually in table format.
It displays the frequency, or count, of each category of the variable.
In this case the variable is cars sold in the past month.
The categories are the four types of cars sold at the dealership.
Each car sold can be grouped into one of the four categories: minivans, SUVs, convertibles, and electric vehicles.
Suppose a dealership sold 750 total cars in the past month
312 were minivans, 102 were SUVs, 80 were convertibles, and 256 were electric vehicles.
The counts of cars sold in each category represent the frequency of the variable, or cars sold in the past month.

These can be computed for the frequency distribution.
This is done by dividing the frequency of each category by the total number of cars sold.
The relative frequency in the category of minivans is 312 divided by 750, which equals 0.416.
The relative frequencies of SUVs, convertibles, and electric vehicles that were purchased in the last month are 0.136, 0.106, and 0.341, respectively.
When all the relative frequencies are summed, the value is 1.
Multiplying the relative frequency by 100 gives the percent frequency.
When all the percent frequencies are added, the sum is 100%.
The minivan and electric vehicle categories have the highest percent frequencies.
They are 41.6% and 34.1%, respectively.
The SUV and convertible categories have small percent frequencies, at 13.6% and 10.6% respectively.
With the frequency distribution completed, it can be stated that out of all the cars sold in the past month, minivans sold the most frequently.
Electric vehicles were second.