How can a class frequency be equal to zero?
Yes.
yes
the frequency is less than OR EQUAL TO the cumulative frequency
When sum of all counts is equal to the population size.
The zero phase frequency is the frequency at which the phase of the input signal and the output signal match.
class frequency is the number of observations corresponding to a particular class.
Zero is equal to zero
Frequency Zero - 2002 is rated/received certificates of: Canada:PG
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
You can say DC voltage has a frequency of zero Hz.Because it is unidirectional in nature (may be positive or negative)
For small frequency of forced oscillation , the phase angle between the forced oscillator and driver is nearly zero . As the driving frequency increases the phase angle increases and is equal is PI/2 ,when both the frequencies (frequency of force and frequency of system for oscillation) are equal. For very large frequency of driver , they are out of phase.