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Chapter 2: Q.20 (page 130)

Use the two frequency tables to compare the life expectancy of men and women from 20randomly selected countries. Include an overlayed frequency polygon and discuss the shapes of the distributions, the center, the spread, and any outliers. What can we conclude about the life expectancy of women compared to men?

Short Answer

Expert verified

The life expectancy of women is bit higher than men from the below drawn polygon.

Step by step solution

01

Content Introduction

To draw the frequency polygon, use the below mentioned 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.
02

Content Explanation

The frequency so formed using Excel is

It can be said that distribution is left skewed and life expectancy of women is bit higher than men.

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Most popular questions from this chapter

Find the mean for the following frequency tables

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Chapter 2| Descriptive Statistics 83

Frequency polygons are useful for comparing distributions. This is achieved by overlaying the frequency polygons drawn for different data sets.
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