by counting them
class frequency is the number of observations corresponding to a particular class.
The relative frequency of a class is the frequency of the class divided by the total number of frequencies of the class and is generally expresses as a percentage.
Class Frequency
How can a class frequency be equal to zero?
To calculate the frequency density we will simply divide the frequency by the class width.
No.
No.
The lower boundary of the median class in a frequency distribution is the smallest value that defines the class interval containing the median. To find it, you first determine the cumulative frequency and identify the class interval where the median lies, which is typically the class with a cumulative frequency that exceeds half of the total frequency. The lower boundary is then the starting point of that specific class interval.
Cumulative frequency is the running total of class frequencies.
Frequency Density multiplied by the class width
Class frequency
class frequency