Statistic Form 2

STATISTIC A branch of Mathematics A study about data including collecting ,recording organizing, presenting, analyzing and interpreting it. Help people in planning and making decision

Data Data is a collection of information or facts Example: Height of 1 AKIK Weight of 2 DELIMA Number of students in each class Population of Malaysia through 1990-2000 Data can be collected by: Counting Measuring

COLLECTING DATA The following data shows the height of 30 students in 3 Mawar measured in the nearest cm. 164 16 1 164 160 164 16 1 162 163 162 160 160 164 163 162 163 162 160 162 164 164 16 1 162 164 162 162 162 163 160 163 163 Is this the most efficient way of displaying data? How do we record the data more systematically? USE FREQUENCY TABLE

Frequency Table 1 f 2 e 3 d 2 c 3 b 2 a Frequency Letters

What is the highest frequency? What is the lowest frequency ? Which height has the highest frequency? Which height has the lowest frequency? What is the different between the highest frequency and the lowest frequency 7 //// // 164 6 //// // 163 9 //// /// 162 3 /// 161 5 //// 160 Frequency Tally Height

Vertical Frequency Table Horizontal Frequency Table Notice that: Total of frequency is the same as the data in the set. 7 164 30 Total 5 163 9 162 3 161 6 160 Frequency Height 7 5 9 3 6 Frequency 164 163 162 161 160 Height

Vertical frequency table Horizontal frequency table Voting for the monitor 1 9 2 6 3 Frequency Sulaiman Yusoff Yasmin Ibrahim Safura Candidates 1 Sulaiman 9 Yusoff 2 Yasmin 6 Ibrahim 3 Safura Frequency Candidates

RECORDING DATA ORGANIZING DATA REPRESENTING DATA

PICTOGRAM BAR CHART LINE GRAPH

PICTOGRAM? Data representation in graphical form What is

Decide on the appropriate symbol to be used: - SinceThe data is related with the number of pupils,. Therefore we can use the symbol as shown . 2.Then decide on how many pupil does this symbol represent. (scaling) Steps: How can we represent this data In graphical form? 2B: 30 =7 1 faces 4 2

What is the total number of students in form 2?

REMINDER: A pictogram must have a title -The title tell us what the table is all about. Legend to show value represented by one symbol Use suitable symbol

represent 5 apples represent 4 pears Sales of Fruits on Particular Day 24 5 C 16 25 B 0 30 A Pear Apple Stall Stall C Stall B Stall A

represent 5 apples represent 4 pears Sales of Fruits on A Particular Day Stall C Stall B Stall A

BAR CHART HORIZONTAL BAR CHART VERTICAL BAR CHART A bar chart is a way of representing the frequencies of data obtained by counting It displays a data using a numbers of bar with the same width. Each bar represent different categories The height of the bars represent the frequencies. Bar chart can be represented horizontally or Vertically

To construct bar chart We need to: Write the title of the chart Label the axes Determine the scales for the axes 4.Draw the bars Vertical bar chart

PROBLEM SOLVING INVOLVING BAR CHART

BAR CHART WHICH CONTAINS 2 SETS OF DATA (DUAL BAR CHART)

The table shows the Yearly enrolment of SMK Baru from 2001- 2003.Construct a dual bar chart to display the Data . 600 700 2003 400 600 2002 500 650 2001 Boys Girls Year

Construct a dual bar chart to show the sales of the burgers 300 300 March 300 400 Feb 300 500 Jan Fish Chicken Month

LINE GRAPH Line graph is always used to represent the data over a period of time . For instance hours, weeks, months or years

A way of representing a set of data over a period of time 100 August 50 July 70 Jun 60 May 50 April 40 March 70 February Mark Month

Determine the suitable scale for the vertical axis 2. Draw the axes and name them and mark the value on it 3. Mark the horizontal axis 4. Plot the points 5. Draw the graph by joining the adjacent points with straight line 6. Give the graph a title REMINDER: The vertical axis always represent quantity while the horizontal axis always represent period/time. To construct line graph

REFER TO LESSON 110 LINE GRAPH (NO 4 )

Statistic Form 2

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