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Grade 9 Statistics Lesson

This lesson for Grade 9 (IGCSE Curriculum) introduces key concepts of Statistics, including data collection, analysis, interpretation, and representation. It covers types of data representation, measures of central tendency (mean, median, mode), and range, along with a worked example and class activities. Students are tasked with calculating statistical measures and creating a bar chart based on provided data.

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404 views2 pages

Grade 9 Statistics Lesson

This lesson for Grade 9 (IGCSE Curriculum) introduces key concepts of Statistics, including data collection, analysis, interpretation, and representation. It covers types of data representation, measures of central tendency (mean, median, mode), and range, along with a worked example and class activities. Students are tasked with calculating statistical measures and creating a bar chart based on provided data.

Uploaded by

fathihabiba92
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Grade 9 Mathematics – Statistics

(IGCSE)
This lesson covers the key concepts of Statistics for Grade 9 (IGCSE Curriculum) and is
designed to fit a 60-minute class session.

1. What is Statistics?
Statistics is the study of data: how to collect, analyze, interpret, and present it.

2. Types of Data Representation


Common types include:

 - Bar Charts
 - Pie Charts
 - Line Graphs
 - Histograms
 - Stem-and-leaf diagrams

3. Measures of Central Tendency


These help us understand the center or average of a data set:

 - Mean: The sum of all values divided by the number of values.


 - Median: The middle value when the data is arranged in order.
 - Mode: The value that appears most frequently.

4. Range
Range = Highest value - Lowest value

5. Worked Example
Given the data set: 5, 8, 6, 9, 7

• Mean = (5 + 8 + 6 + 9 + 7) ÷ 5 = 35 ÷ 5 = 7

• Median = 7 (after ordering: 5, 6, 7, 8, 9)

• Mode = None (all values appear once)

• Range = 9 - 5 = 4
6. Class Activity
1. Find the mean, median, mode, and range for: 12, 15, 11, 15, 14

2. Draw a bar chart for the following data:


Apples: 10, Bananas: 15, Oranges: 5, Grapes: 12

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