I have a relatively simple question, but I am not sure if I understand it right.
I have estimated through my calculations the value $X$. $X$ depends on many things, but one of them is $Y$ and I know that $Y$ has a coefficient of variation of $15\%$.
QUESTION: I need to estimate the value of $X$ that probability that $X$ should fall below that number is less than $10\%$.
Do I understand is correct: $Y$ varies by $\pm15\%$. And now then I calculate my $X$ value based on this, I have a probability of $100-15 = 85\%$ that my value of $Y$ would be $10\%$ lower due to that?