I have a discrete random variable with values from $0$ to $100$. I have plotted its histogram with bars centered in $0, 5, 10,\dots,100$. First I made the histogram using the
But I notice that the sum of values (height) of, for example, bars $\ge 70$ only sums $0.086$. And therefore, I do not know if the $y$-axis should say probability.
After that, I have used option
In this case, the bars sum to $1$ which indicates that each bar has its value of probability.
I know this can be more a mathematical question than a question about the Mathematica language, but I do not understand the difference between the two options,
"Probability". Besides, I do not know how to label the $y$-axis. What label results are more appropriate? Probability? Density? Relative frequency?
Thank you very much for your help.