MICRO LESSON 1
What Is Data?
Picture it:
A teacher records marks of all students.
Simple:
Data is a collection of facts or numbers.
Example:
Heights, scores, ages.
Quick Check:
Give one data example.
MICRO LESSON 2
Raw Data
Picture it:
Unorganised observations are raw data.
Simple:
They may be difficult to read.
Example:
7,3,9,7,5,3...
Quick Check:
Why organise it?
MICRO LESSON 3
Frequency
Picture it:
Frequency tells how often a value occurs.
Simple:
Count repetitions.
Example:
If 7 appears 4 times, frequency is 4.
Quick Check:
Find frequency of 2 in 2,3,2,4.
MICRO LESSON 4
Frequency Distribution
Picture it:
A table organises values and counts.
Simple:
It makes patterns visible.
Example:
Score and number of students.
Quick Check:
What are the two columns?
MICRO LESSON 5
Grouped Data
Picture it:
Large ranges are divided into class intervals.
Simple:
Intervals such as 0-10,10-20.
Example:
Heights grouped by ranges.
Quick Check:
What is a class interval?
MICRO LESSON 6
Bar Graph
Picture it:
Separate bars compare categories.
Simple:
Height represents value or frequency.
Example:
Favourite sports.
Quick Check:
Why gaps?
MICRO LESSON 7
Histogram
Picture it:
Adjacent bars represent continuous class intervals.
Simple:
Bars touch because intervals are continuous.
Example:
Marks 0-10,10-20...
Quick Check:
Difference from bar graph?
MICRO LESSON 8
Frequency Polygon
Picture it:
Join class-mark points with straight lines.
Simple:
It shows shape of distribution.
Example:
Peaks show common ranges.
Quick Check:
What is plotted horizontally?