1. DATA HANDLING:
MEAN, MEDIAN, MODE

2. Mean (average) = 𝒔𝒖𝒎 𝒐𝒇 𝒂𝒍𝒍 𝒗𝒂𝒍𝒖𝒆𝒔 𝒊𝒏 𝒅𝒂𝒕𝒂 𝒔𝒆𝒕 𝒕𝒐𝒕𝒂𝒍 𝒏𝒖𝒎𝒃𝒆𝒓 𝒐𝒇 𝒗𝒂𝒍𝒖𝒆𝒔 𝒊𝒏 𝒅𝒂𝒕𝒂 𝒔𝒆𝒕

3. Median = middle value

4. Mode = value occurs the most

5. Range = highest value – lowest value

6. Show video:
MMMR rap

7. Using Geogebra in Data Handling
Finding mean, median & mode:
The following are the marks for a class test:
46, 27, 39, 51, 38, 40, 13, 25, 53, 44, 39, 25, 33, 23, 41, 25, 47, 29, 47, 19, 45, 22, 46
Methods on Geogebra:
Using input bar
Using input bar and spreadsheet view

8. Method 1: Using input bar
Input bar results after pressing enter
Explanation of calculation
Input bar
Input help button

9. Method 2: Using input bar & spreadsheet view

10. Method 2: Using input bar & spreadsheet view
Click create – list – the following will appear in the algebra window

11. Method 2: Using input bar & spreadsheet view
Type the following into input bar and enter to get above values

12. Show video:
Using Geogebra to calculate Mean and Median

13. Now lets try it ourselves:
The following exercise will be done in the Geogebra computer program: A grade 10 class has the following shoe sizes amongst all the learners: 6, 3, 8, 7, 8, 4, 6, 6, 8, 12, 6, 6,11, 6, 9, 9, 9, 6, 9, 11, 12, 10, 4, 4, 5, 6, 7, 5, 5, 5 Determine the mean, median & mode using Geogebra.