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Chapter 2: Q.18 (page 129)

Construct a frequency polygon for the following:

a.

b.

c.

Short Answer

Expert verified

a. The frequency polygon:

b. The frequency polygon:

c. The frequency polygon:

Step by step solution

01

Content Introduction

A frequency polygon is a line graph representing class frequency against the midpoint of the class. The midpoints of the tops of the rectangles in the histogram can be joined to get it.

02

Explanation (Part a)

To draw frequency polygon, we need to enter the below data in Excel:

Steps followed are:

  1. Enter the data in excel worksheet as shown above.
  2. select Lower bound and frequency together. Go to insert and click on line chart.
  3. the chart will appear. Right click on any point and click on format data series.
  4. Go to marker option and select marker of choice and size.
  5. Click OK to get overlayed frequency polygon.

The so formed frequency polygon is

03

Explanation (Part b)

To draw frequency polygon, we need to enter the below data in Excel:

Steps followed are:

  1. Enter the data in excel worksheet as shown above.
  2. select Lower bound and frequency together. Go to insert and click on line chart.
  3. the chart will appear. Right click on any point and click on format data series.
  4. Go to marker option and select marker of choice and size.
  5. Click OK to get overlayed frequency polygon.

The so formed frequency polygon is

04

Explanation (Part c)

To draw frequency polygon, we need to enter the below data in Excel:

Steps followed are:

  1. Enter the data in excel worksheet as shown above.
  2. select Lower bound and frequency together. Go to insert and click on line chart.
  3. the chart will appear. Right click on any point and click on format data series.
  4. Go to marker option and select marker of choice and size.
  5. Click OK to get overlayed frequency polygon.

The so formed frequency polygon is

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