D. Discrete and Continuous Data

D. Discrete and Continuous Data

Not all data should be connected with a line. Connection implies there is additional data that exists between plotted data values. However, sometimes additional data does not exist between data values. This type of data is called discrete data. For instance, the number and value of each type of coin in a piggy bank are discrete. There is no type of coin with a value in between any of the indicated values on graph and the piggy bank contains only whole numbers of coins.

Discrete Data distinct values that are not connected by a line when graphed. Discrete data is counted, not measured.

The points are not connected on a graph when the data is said to be discrete because no values exist between the plotted points. When data exists between known data values, the data is called continuous data and a line is used to connect the data values. For instance, the temperature of water as it is heated is continuous. The water cannot go from 50°C to 100ºC without taking on every temperature measurement, decimals included, between the two values. Time is also continuous.

Data is continuous if the values can be measured and broken down into smaller parts, while still having meaning.

Continuous Data attached, uninterrupted values that are connected by a line when graphed. Continuous data is measured, not counted.