What is the correct punctuation for I see a pretty rainbow

Usually a period or an exclamation mark would work. Most likely, since the sentence is presenting excitement, the answer is “!”

Ifound this on google “a skewed (non-symmetric) distribution is a distribution in which there is no such mirror-imaging. a "skewed right" distribution is one in which the tail is on the right side. a "skewed left" distribution is one in which the tail is on the left side. the above histogram is for a distribution that is skewed right.” i hope this you for what your looking for