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.