## Download ML Aggarwal Solutions for Class 9 Maths Chapter 20 Statistics - Free PDF

## FAQs on ML Aggarwal Solutions for Class 9 Maths Chapter 20 Statistics - PDF

**1. What is a bar graph?**

A rectangular format of graph used to represent a set of data in the form of bars is called a bar graph.

**2. What is a histogram?**

It is essentially a bar graph but is considered to represent statistical data with a continuous class interval.

**3. How can we draw a frequency polygon?**

We have to draw a histogram first with the available sets of data. The class mark is then calculated and marked to draw a frequency polygon.

**4. What is mean?**

The average of a number of observations determined by adding the observation values and dividing it by the number of observations is called the mean.

**5. What is a median?**

The middle value of a number of observations that exactly divided it into two equal parts is called a median.