1. DATA HANDLING

2. DATA = INFORMATION Collected from: Collected via:
People, animals, plants, etc.
Collected via:
Surveys, census, questionnaires, interviews

3. Survey vs. Census Survey = sample of population (population too big).
Census = entire population
(Grade 12 national and global statistics).

4. Survey vs. Census

5. Organising data Sorting data into a particular order.
Categories (male/ female; alphabetical)
Numerical (ascending/ descending)
Then arranged into frequency table with tallies – shows frequency of each value.

7. Displaying data
Bar graph or histogram

8. Displaying data
Pie chart

9. Displaying data
Line graph

10. Summarizing data Using measures of central tendency:
Mean
Median
Mode
And measures of spread:
Range

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

12. Median = middle value

13. Mode = value occurs the most

14. Range = highest value – lowest value