The relative frequency for those salespersons that earn from 1,600 up to 1,800 is the number 0.20 is found by 24/120.
How frequently an event repeats in a certain period of time is a measure of its frequency. It is also sometimes referred to as ordinary frequency or temporal frequency to stress distinctions with spatial and angular frequencies, respectively. One (event) per second, or hertz (Hz), is how frequency is expressed. The period is the inverse of the frequency since it is the length of one cycle in a repeating occurrence. For instance, the period, T, between each beat of a heart beating at a frequency of 120 beats per minute (2 hertz), is equivalent to 0.5 seconds (60 seconds divided by 120 beats).
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