PRESENTATION OF DATA: IN LIST, TABLE AND LINE GRAPH
SUBJECT: MATHEMATICS
CLASS: JSS 2
DATE:
TERM: 3rd TERM
REFERENCE
WEEK SIX
TOPIC: PRESENTATION OF DATA: IN LIST, TABLE AND LINE GRAPH
CONTENT: i. Rank order list
iii. The line graph
RANK ORDER LIST
Raw data: Data which is in random order (i.e.) arranged in any kind of order is called raw data. One way to present or organize the data in a more meaningful way is to arrange it in rank order or sorting it into categories. Rank order means in order from highest to lowest. Note:Data should be presented clearly. Good presentation makes statistical data easy to read and understand.
Example: B,C,A,B,A,D,E,C,A,B,B,E,B. this 15 grade are given rank order below:
A,A,AB,B,B,B,C,C,C,D,E,E,F.
Reading Assignment
FREQUENCY TABLE
Raw can also be arranged in a table called the frequency table as shown in the diagram below. The number of times each particular value occurs is called its frequency. The frequency table is usually made up of three columns.
Example: 2, 5, 4, 6,3, 4, 7, 5, 7, 7, 8, 9, 5, 3,4, 4, 8, 2, 2, 2, 5
Vehicles | Tally | Frequency |
2 | III | 3 |
3 | III | 3 |
4 | IIII | 5 |
5 | IIII | 4 |
6 | I | 1 |
7 | IIII | 4 |
8 | II | 2 |
9 | I | 1 |
TOTAL | 25 |
Evaluation
The following figures show the number of children performing in a sample of 40 households.
1, 2, 4, 3, 5, 8, 3, 2, 2, 3, 4, 5, 6, 5, 4, 2, 1, 3, 2, 4, 5, 3, 8, 7, 6, 3, 8, 6, 3, 5, 7, 5, 4, 3
Reading Assignment
Essential mathematics by AJS Oluwasanmipage 184 – 185
THE LINE GRAPH
A line Graph is a bar-chart with bar replaced by straight lines which represent the frequency of each item.
Example: The scores of 30 students in mathematics test are shown below
8, 6, 2, 0, 0, 2, 4, 1, 0, 6
4, 2, 8, 8, 1, 0, 0, 2, 4, 2
2, 8, 6, 4, 1, 0, 0, 6, 2, 4
Use the frequency table to construct a line-graph solution
Vehicles | Tally | Frequency |
0 | IIII II | 7 |
1 | III | 3 |
2 | IIII II | 7 |
4 | IIII | 5 |
6 | IIII | 4 |
6 | IIII | 4 |
Line-Graph for students mathematics test scores.
10
9
8
7
6
5
4
3
2
1
0 2 4 6 8 10
GENERAL EVALUATION QUESTION
Twenty four pupils went out to pick some pears. The number of pears picked by each pupil was recorded as follows:
6, 4, 3, 2, 3, 4, 1, 3, 5, 1, 6, 2,
2, 3, 2, 2, 3, 5, 2, 4, 3, 3, 1, 6
REVISION QUESTION
The shoe sizes of 20 boys are as follows:
8, 10, 9, 10, 11, 9, 8, 9, 12, 9
10, 9, 9, 8, 8, 9, 10, 19, 9, 11
READING ASSIGNMENT
Essential Mathematics for JSS 2 chapter 23,pages 295 – 298
Exercise 23.2 No 7 pages 301
WEEKEND ASSIGNMENT
IIII IIII IIII III
The table below shows the marks obtained by students in a physics test.
Mark | 5 | 6 | 7 | 8 | 9 | 10 |
Tally | II | II | IIII I | IIII III | III | IIII |
THEORY
5 0 4 2 5 1 3
2 4 0 0 3 0 2
1 2 3 3 4 0 5
Draw line graph for the data.
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