The density of my data set was plotted in R as follows.
What kind of distribution would fit this data?
As I am not experienced to tell by visualization, I can only guess it is not normally distributed. I shall test it with R: some guidance as a starting point is highly desirable.
Best Answer
It looks rather like an exponential distribution (assuming that the bit below 0 is an artifact of smoothing in the density estimation).
I would look at a qqplot. In R, if
x
contains your data:Note that in the use of
density()
for the non-negative case, it is best to usefrom=0
since you know the density is 0 below 0.I think also that, if $X$ follows an exponential distribution, then $e^{-X/\mu_X}$ should follow a uniform distribution, so the following could be a reasonable diagnostic: