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The mean for any data set is an average of numbers that is found by adding the values of the data and dividing by the number of values.
There are 6 students in Irma's group. Here are the number of books they read in one month.
Find the mean number of books Irma's group read by using connecting cubes:
- How many connecting cubes do you need? What does each cube represent?
- How many towers will you make? What does each tower represent?
- What is the mean number of books?
It is impossible to give each tower an equal number of cubes. Each tower has at least 7 cubes. This tells us that the average is more than 7, but less than 8.
- Find the mean number of books Irma's group read by using a calculator.
- What numbers did you add?
- What number did you divide by?
- Find the median number of books Irma's group read.
- How do the mean and the median compare?