What is the correct definition of frequency density?
According to a textbook I am teaching from, frequency density is merely proportional to $\dfrac{\text{frequency}}{\text{class width}}$, and could be a multiple of $\dfrac{\text{frequency}}{\text{class width}}$.
This seems wrong to me. For example, one would not say that population density could be $2\times\dfrac{\text{population}}{\text{area}}$. So why is it OK to do this with frequency density? Is the textbook misusing the term 'frequency density'?
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$\begingroup$Frequency density is defined as the ratio of the frequency of a class to its width. There is no proportionality constant or anything of that sort.
I feel this page will help you. I am afraid the book is wrong.
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