The grouped data are called:

The suitable formula for computing the number of classes is:

The extreme values used to describe the different classes in a frequency distribution are called:

The class boundaries can be taken when the nature of variable is:

Class boundaries are also called:

The average of lower and upper class limits is called:

The lower and upper class limits are 20 and 30, the midpoints of the class is: The average of lower and upper class limits is called:

A grouping of data into mutually exclusive classes showing the number of observations in each class is called:

The class frequency divided by the total number of observations is called:

In a relative frequency distribution, the total of the relative frequencies is: