DATA HANDLING: MEAN, MEDIAN, MODE.

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Presentation transcript:

DATA HANDLING: MEAN, MEDIAN, MODE

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

Median = middle value

Mode = value occurs the most

Range = highest value – lowest value

Show video: MMMR rap https://www.youtube.com/watch?v=0grjKjxFlDc

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

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

Method 2: Using input bar & spreadsheet view

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

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

Show video: Using Geogebra to calculate Mean and Median https://www.youtube.com/watch?v=V4d9J5hA6iU

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.