Explanation:
Set up a new column to multiply each category by its frequency.
Find the sum of the new column. This finds the total of all the values in the frequency table.
Add the frequencies to find how many values there are.
Divide the total of all the values by how many values there are.
Key points
A set of data can be presented in a
frequency
table instead of a long list of numbers. A frequency table shows how many times a value occurs.
To find the sum of all the values, multiply each category by its frequency and then find the total of the results. The sum of all the frequencies shows how many values there are. The mean is the sum of all the values divided by how many values there are.
The
mode
from a frequency table is the value that has the highest frequency.
The
range
measures how spread out the data is. It is the difference between the lowest and highest value.
