# Mathematics Guides for SS 1 Statistics – Data Representation

**MATHEMATICS **

**THEME – STATISTICS **

**TOPIC 1 – DATA REPRESENTATION **

**INSTRUCTIONAL MATERIALS**

1. Objects that can be classified, e.g corks of soft drinks, etc.

2. Posters containing real life data

3. Graph board

4. Graph papers

5. Compass and protractor

**LEARNING OBJECTIVES **

By the end of the lesson, students should be able to:

1. Collect, tabulate and present data in a meaningful form.

2. Construct frequency tables.

3. Identify and draw different types of linear grpahs and bar charts.

4. Draw histograms with equal and unequal sides.

5. Differentiate between bar charts and histograms.

6. Calculate the sectorial components of a pie chart.

7. Draw a pie chart correctly.

8. Interpret the pie chart.

9. Construct the frequency polygon of a given distribution.

**CONTENTS OF THE LESSON**

**FOCUS LESSONS **

1. Revision on collection, tabulation and presentation of data

2. Frequency distribution

3. Linear graphs, bar graphs and histograms

4. Pie chart

5. Frequency polygon

**LESSON PRESENTATION**

TEACHER’S ACTIVITIESTeacher,

1. Guides students to provide information on their aged number of children in the families and other areas of life.

2. Guides students to tabulate data collected.

3. Guides students to lists the various forms of presentation of data.

4. Leads students to construct a table from given data.

5. Guides students to draw different types of linear graphs and bar graphs including component bar graphs.

6. Leads students to construct grouped frequency tables and use same to construct histograms.

7. Calls out students to identify the differences between bar charts and histograms.

8. Leads students to calculate the angular equivalent of the different frequencies in a given distribution using the idea of ratios and proportion.

9. Guides students to draw pie charts using their compass, and protractors.

10. Guides students to interpret the pie chart in terms of the sectorial angles.

11. Guides the students to construct the frequency polygon of a given distribution.

STUDENT’S ACTIVITIESStudents,

1. Submit objects like corks, etc to the class.

2. Tabulate the objects into specific categories.

3. List the various forms of presenting data.

4. Construct a table from the given data.

5. Draw linear and bar charts of given ungrounded data.

6. Construct grouped data frequency tables and use them to draw histograms.

7. Enumerate the differences between bar-charts and histograms.

8. Calculate the sectorial angles; draw pie-charts correctly to interpret data.

9. Construct the frequency polygon from a grouped data.

**LESSON EVALUATION**

Students to,

1. Collect and group various objects.

2. List various forms of presenting data.

3. Construct frequency tables.

4. Identify and draw different types of linear graphs and bar-charts.

5. Draw histograms with unequal and equal widths.

6. Calculate sectorial components of pie charts.

7. Draw pie charts using real life data.

8. Interpret data presented in a pie chart.

9. Construct a frequency polygon.