data presentation jss 3

Data Presentation - Mathematics for JSS 3 - JSS 3 - Notes, Videos & Tests

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Importance of Data Presentation JSS 3

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Mathematics JSS3 Third Term Data Presentation

• Data Presentation

Mathematics J.S.S 3 Third Term

Theme: Measurement and geometry

Sub Theme: Shapes

Performance Objectives

Students should be able to;

• Represent information on Pie chart
• Interpret a pie chart

A pie chart is a circular graph showing a distribution. The pie chart is divided into sectors that are proportional to the frequency or class frequencies of items in a distribution.

The total frequencies of the distribution in a pie chart are equal to 360 0 which is the angle in a circle.

The table below shows grades obtained in an examination. Construct a pir chart to show the information.

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• Areas of Plane Figures 1
• Areas of Plane Figures 2
• Measure of central tendency 1
• Measure of central tendency 2
• Construction
• Mathematics JSS3 Third Term Assessment
• Category JSS3
• Author ClassNotes Edu

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Back to: MATHEMATICS JSS3

Welcome to Class !!

We are eager to have you join us !!

In today’s Mathematics class, We will be talking about Statistics.  We hope you enjoy the class!

Types of Presentation

A good presentation  can make statistical data easy to read, understand and interpret. Therefore it is important to present data clearly.

• There are two main ways of presenting data: presentation of numbers or values in  lists  and  tables;
• A presentation using graphs,  i.e. pictures. We use the following examples to show various kinds of presentation.

She graded the essays from A (very good), through B, C.D, E to f (very poor). The grades of the students were:

B, C, A, B, A, D, F, E, C, C, A, B, B, E, B

Lists and tables

Rank and order list

Rank order  means in order from highest to lowest. The 15 grades are given in rank order below:

A, A, A, B, B, B, B, C, C, C, E, E, F

Notice that all the grades are put in the list even though most of them appear more than once. The ordered list makes it easier to find the following: the highest and lowest grades; the number of students who got each grade; the most common grade; the number of students above and below each grade; and so on.

Frequency table

Frequency  means the number of times something happens. For example, three students got grade A.

The frequency of grade A is three. A  frequency table gives the frequency of each grade.

Graphical presentation

In most cases, a picture will show the meaning of statistical data more clearly than a list of or table or numbers. The following methods of presentation give the data of the example in a picture, or graph form.

A  pictogram  uses pictures or drawings to give a quick and easy meaning to statistical data.

A bar chart represents the data as horizontal or vertical bars. The length of each bar is proportional to the amount that it represents.

There are 3 main types of bar charts.

Horizontal bar charts, vertical bar chart and double bar charts.

When constructing a bar chart it is important to choose a suitable scale to represent the frequency.

Pie charts  are useful to compare different parts of a whole amount.  They are often used to present financial information.  E.g. A Company’s expenditure can be shown to be the sum of its parts including different expense categories such as salaries, borrowing interest, taxation and general running costs (i.e. rent, electricity, heating etc.).

A pie chart is a circular chart in which the circle is divided into sectors.  Each sector visually represents an item in a data set to match the amount of the item as a percentage or fraction of the total data set.

A family’s weekly expenditure on its house mortgage, food and fuel are as follows:

Draw a pie chart to display the information.

The total weekly expenditure = N300 + N225 + N75 = N600

We can find what percentage of the total expenditure each item equals.

Percentage of weekly expenditure on:

Mortgage =  300 600   X 100% = 50%

Food =  225 600  X 100% = 37.5%

Fuel =  75 600  X 100% = 12.5%

To draw a pie chart, divide the circle into 100 percentage parts.  Then allocate the number of percentage parts required for each item.

It is simple to read a pie chart.  Just look at the required sector representing an item (or category) and read off the value.  For example, the weekly expenditure of the family on food is 37.5% of the total expenditure measured.

A pie chart is used to compare the different parts that make up a whole amount.

The following is a rank order list of an exam result: 87, 82, 78, 76, 75, 70, 66, 64, 59, 59, 59, 51, 49, 48, 41.

• How many students took the exam?
• What was the highest rank?
• What was the lowest rank?
• What is the mark of the student who came 6th?
• What is the position of the student who got 76 marks?
• Three students got 59 marks. What is their position?
• How many students got less than 75 marks?

We have come to the end of this class. We do hope you enjoyed the class?

Should you have any further question, feel free to ask in the comment section below and trust us to respond as soon as possible.

In our next class, we will be talking about Factorization involving Common Factors.  We are very much eager to meet you there.

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Data presentation(pie charts)

Students should be able to represent and interpret an information on pie charts

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Mathematics Guides for JSS 3 Data Presentation and Measure of Central Tendency

MATHEMATICS 

THEME – DATA COLLECTION AND PRESENTATION 

TOPIC – PIE CHART AND MEASURE OF CENTRAL TENDENCY 

Instructional materials.

1. Pie charts 2. Mathematical set 3. Data chart on activities

LEARNING OBJECTIVES

By the end of the lesson, students should be able to: 1. represent and interpret an information on pie charts. 2. review their previous work on mean, mode and median. 3. calculate the median of a given data. 4. find the mode of given data. 5. calculate the mean of any given data.

6. find the range of any given data. 7. apply measures of central tendency to analyze any given information.

CONTENTS OF THE LESSON

FOCUS LESSONS 

1. Pie Charts 2. Meaning and uses of Mean, Median, Mode and Range 3. Find the mean, median, mode and range of data. 4. Application of measures of central tendency to analyze any given information.

LESSON PRESENTATION

TEACHER’S ACTIVITIES 1. Leads students to represent and interpret data in pie charts. 2. Guides students to review the meaning of mean, median and mode of data. 3. Guides students to find the median of ungrouped data. 4. Guides students to find the mode of ungrouped data. 5. Leads students to calculate the means of a given data.

6. Leads students to find the range of any given data. 7. Leads students to analyze any given data using the measures of central tendency.

  STUDENT’S ACTIVITIES 1. Represent and interpret data in a pie chart. 2. Represent data on pie charts. 3. Review the meaning of mean, median and mode of data. 4. Find the median of ungrouped data. 5. Find the mode of ungrouped data. 6. Calculate the mean of a given data. 7. Find the range of any given data. 8. Analyze given data using the measures of central tendency.

LESSON EVALUATION

Students to, 1. represent data from his environment on a pie chart. 2. carryout review exercises on mean, mode and median. 3. find the median of a given set of data. 4. find the mode in any given data. 5. calculate the mean of any given data. 6. find the range of any given data. 7. use measure of central tendency to analyze any given data.

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JSS3 First Term Mathematics Lesson Note – Statistics

by Sunday | Nov 21 | Lesson Notes | 0 comments

The content is just an excerpt from the complete note for JSS3 First Term Mathematics Lesson Note – Statistics. Check below to download the complete DOCUMENT

TOPIC: Statistics

(a)        Data presentation (Revision)

(b)        Range of a set of values

DATA PRESENTATION

RANK-ORDERED LIST

Rank order means arranging data values from the highest to the lowest.

Some JCSE students scored these grades in a revision test: C, B, D, A, C, C, E, B, D, F, B, D, E, C, A, C, D, B. Represent the data in rank order.

Here is the rank order list from A to F:

A, A, B, B, B, B, C, C, C, C, C, D, D, D, D, E, E, F

FREQUENCY TABLE

A frequency table shows the number of times a value appears. A frequency table can be prepared for a give data set data either vertically or horizontally.

In a class of 30 students seated in six rows of five students each, the class monitor records the following dates of births, row by row.

Wed.          Thur.             Sun.           Tue          Fri.

Mon.          Wed.             Tues.         Fri.           Sun.

Sun.            Wed.             Mon          Tues.       Sat.

Fri.              Sat.                Sun.           Thur.      Wed.

Mon.          Sat.                Sun.           Fri.          Mon

(a)        Represent the above data in a frequency table.

(b)        How many students were born on Tuesdays?

(c)        In what date were most students born?

(d)        In what date were the least number of students born?

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