This lesson is a pre-probability introduction to Statistics including representation of data and measures of central tendency.
A table is a set of facts and figures arranged in rows and columns.
Hosts of the FIFA World Cup
2010 South Africa
2002 South Korea / Japan
Charts and graphs
A graph is a drawing that shows the relationship between two things.
It is a diagram displaying the relationship between numbers or amounts. Most graphs use bars, lines, or parts of a circle to display data.
Line Graph A line graph utilises two axes on a paper to show the relationship between two quantities by means of a curve.
A bar graph is similar to a line graph but one of the axes is not numerical.
Histogram is a bar graph where the independent axis is quantitative but divided into groups instead of individual values.
The mean is the common “average”, where all the numbers in a dataset are added up and divided by the number of data points.
The median of a dataset is the “middle” value in the list of numbers. To find the median, it is necessary to list the numbers in numerical order.
The mode of a dataset is the value that occurs most often. If no number in the list is repeated, then it does not exist.
Consider the list 13, 18, 13, 14, 13, 16, 14, 21, 13.
The mean is 15.
The median is 14.
The mode is 13.