The difference between the highest and the lowest value of the observations in a data is known as _____________________.

The number of times a particular item occurs in a class interval is called its ________________

0-10, 10-20, 20-30 .... so on are the classes, the lower boundary of the class interval 20 - 30 is _______________ .

A random survey of numbers of children of various age group playing in a park was found as follows:

Then the number of children playing between the age group of 10-15 years are ________________.

Facts or figures collected with a definite purpose are called _______________ .

____________________ means to arrange the numerical data so that it can be analysed for the purpose of arriving at an informed conclusion.

The inclusive form of class boundary is defined as ________________________________________.

In which year the difference between the highest and the average marks in Maths was maximum ?

Which of the following statement is not true regarding range of data:

1. It tells us how widely the numbers are spread.

2. It is the difference of the highest and the lowest observation.

3. It is the average number of observations.

The histograms and pie charts are classified as one dimensional diagrams because only .