Graphical representation | Introducing key terms

Read the words and discuss what you think they might mean before revealing the definition.

	Frequency tables — A chart/table which shows the rate of occurrence (frequency) for a number of measured values/categories.
	Graphical representation — A range of diagrams that show the rate of occurrence for a number of measured values/categories.
	Bar chart — A diagram that represents frequencies of non-continuous data.
	Line graphs — A diagram that shows a linear representation of frequencies of data.
	Histograms — A diagram that represents the distribution of frequencies for discrete or continuous data.
	Pie charts — A diagram that represents data proportionately, as part of a whole picture of responses.
	Scatter diagrams — A diagram that represents a relationship/correlation between two or more co-variables.
	Distribution curves* — Linear representations of data that include a mean, median and modal score to show a spread of data.
	Normal distribution* — A type of distribution where the mean, median and mode are equal. This can be referred to as a bell curve.
	Negative skewed distribution* — A type of skewed distribution, where the mode is greater than the mean.
	Positive skewed distribution* — A type of skewed distribution, where the mode is less than the mean.

* A2 WJEC