One-Way Tables

## One-Way Tables

Information about Experimental Probability can be captured in a number of different ways. If there is only one piece of information being captured, such as the roll of a dice, or the colour of cars on a motorway, then the information can be captured in a One-Way table.

One-way tables can be shown either vertically or horizontally.

One-way tables do not always show a total, although a total is required to work out the probability of an event happening.

## Example 1

A die was rolled twenty times. The results were plotted onto a one-way table:

 Throw 1 2 3 4 5 6 Frequency 3 4 4 2 3 4

Which value appeared the least often?

There were only 2 instances with a value of 4; the other values appeared more often.

A survey of cars along a road was recorded in a notebook. The entry for the number of Red cars was obliterated by rain. If it was known that frac(1)(4) of the cars were white, and that an frac(1)(8) of the cars were red.