A
statistical question is one where there is
variability in the answers to the question.
Numeric data from a statistical question can be displayed in a
line plot.
A line plot is a data display, along a number line, which shows frequency.
The frequency is represented with a marker, like an
x or a dot.
Mean, median, and range can be used to analyze data in a line plot.
- The mean, or average, of a data set is the sum of the values in the data set divided by the number of values in the data set.
- The median is the middle value in an ordered data set.
- The range is the difference between the greatest and least values in a data set.
First, find the sum of the values in the data set.
There are thirteen 8-inch skillets, seven 9-inch skillets, ten 10-inch skillets, and ten 12-inch skillets.
13(8 in.) + 7(9 in.) + 10(10 in.) + 10(12 in.) | = | 104 in. + 63 in. + 100 in. + 120 in. |
| = | 387 in. |
Then, divide the sum by the number of values shown in the graph, 40.
So, the mean diameter of the skillets is 9.675 inches.