what is true for poisson distribution?
a.
mean and variance are always equal
b.
mean always greater than variance
c.
mean always smaller than variance
d.
none of the above

Option 'a' is correct.

Step-by-step explanation:

Poisson distribution is used when the number of successes are independent and success that occur in interval must be same in all intervals and of equal size.

In poisson distribution,

Mean  is always equal to variance.

Mathematically it is expressed as

E[x]=V[x].

So, Option 'a' is correct.

one set of data has more variation than the other. hope this !

the functions have the same rate of change i think. i narrowed it down to this answer and "the rate of change of tour 1 is greater" but i got it wrong using that answer so im assuming its the answer above. (this is a question i also answered from the iready site if anyone needs a reference)