ST1 Statistics : Tables and Graphs (Level 2-6)

Using Table and Graph

                

                                   Animals in a pet shop

Imagine you work in a pet shop and always have to answer these questions:

How many animals are there? (9) How many different types of animals? (4) What are the number of the different animals? (Need to count again?) Which animals has the most number? (Dogs)

The data can also be given in a Table format:

Animal	Number
Bird	1
Cat	3
Dog	4
Rabbit	1

Is it easier to find the answer to the questions by looking at the table?

 The data can also be presented as a graph:

                                   

The use of a table/graph

            (1) present data in a easy-to-read format

            (2) Give the most important facts

            (3) Easy to remember

Drawing and Understanding the Graph
How to present data in table form as a bar graph?

                                             

Drawing and Understanding the Graph

DO - Draw the Bar Graph with your student:

Fruit	Numbers
Apple	1
Pear	2
Orange	2
Banana	3
Total	10

A GRAPH has

            (1) 1 vertical line (name=y-axis)  with information

            (2) 1 horizontal line(name=x-axis) with associated information

               <The lines are right-angle to each other and usually starts with value 0>

            (3)  Quantity Value, usually shown as lines or bars.

       Practice: Read the Bananas and Pear information with the student

Common Graph Questions

Usually, a bar or line graph will be given, and the questions are:

Type1: To find the value on the y-axis with given Information on the x-axis.

Type 2: To find value on the x-axis with given Information on the y-axis.

Type 3: To find the total value or a required summation(eg : Total, more than, less than certain condition)

Example

The graph shows the favourite TV programs listed by a group of students.

    Step1: Circle/Underline Keywords and required value (Comedy, number?)

              : Number ->value (y-axis)

   Step2: Map ‘Top’ of Comedy, ‘Line’ across to y-axis, Circle number value.

   Step3: Solve: 15 students like Comedy TV program

   Step1: Circle/Underline Keywords and required value (Most student like, which program?)

               : Program à   (x-axis)

   Step2: Map/Trace “favourite’ -> Highest; Down x-axis , Circle Value

   Step3: Solve: Favourite program is Cartoon

   Step1: Circle Keywords (total) and required value ( number student)

   Step2: Map required value from graph

                 Total = Add all the students = 15+10+20+15

   Step3: Solve: Total students = 60.

          ~~~~ END ~~~~ :)