select all correct answers for the Poisson probability distribution:

a) an example of a Poisson trial is counting the number of misspelled words in a magazine article

b) The Poisson distribution describes a situation where the probability of success does not remain the same from trial to trial

c) The variables in a Poisson trial are counted

d) The Poisson distribution is always positively skewed

e) The Poisson distribution describes a number of events occurring in a unit of space or time

f) the variables in a Poisson trial are measured

g) The Poisson's distribution mean=median=mode

h) an example of a Poisson trial is selecting the members of a committee from one business