All Poisson distributions are right skewed. The mean, $\mu$, and the standard deviation, $\sigma$, of a Poisson random variable with parameter $\lambda$ are
$$ \mu = \lambda$$and $$ \sigma = \sqrt{\lambda}\, .$$
Citation
The E-Learning project SOGA-Py was developed at the Department of Earth Sciences by Annette Rudolph, Joachim Krois and Kai Hartmann. You can reach us via mail by soga[at]zedat.fu-berlin.de.
Please cite as follow: Rudolph, A., Krois, J., Hartmann, K. (2023): Statistics and Geodata Analysis using Python (SOGA-Py). Department of Earth Sciences, Freie Universitaet Berlin.