Form 4 Mathematics Chapter 6
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Transcript of Form 4 Mathematics Chapter 6
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8/13/2019 Form 4 Mathematics Chapter 6
1/1
Chapter 6: Statistics
Frequency Table for Grouped Data:
Score Frequency Cumulative
Frequency
Lower
limit
Upper
limit
Lower
Boundary
Upper
Boundary
Midpoint
13 4 4 1 3 0.5 3.5 2
46 2 6 4 6 3.5 6.5 5
79 9 15 7 9 6.5 9.5 8
10 - 12 3 18 10 12 9.5 12.5 11
Class interval: 1-3, 4-6, 7-9, 10-12
Class size: Upper BoundaryLower Boundary
Modal class: Class interval with the highest
frequencyExample: 7-9 Mean =
( )
Histogram Frequency Polygon
Ogive
Mark the x-axis with class
boundariesMark the x-axis with midpoints
FrequencyFrequency
Mark the x-axis with
upperboundaries
Third quartile
Median
First quartile
3n/4
n/2
n/4
n
Cumulative Frequency
Form 4 Mathematics
Chapter 6: Statistics
Interquartile range= Third Quartile - First Quartile
Range
= Highest value - Smallest value
For grouped data,
Range
= Midpoint of last class - midpoint of
first class