what is the simplest way to understand a cumulative binomial values chart?

Question

In simple terms please. I have a text but can't understand it

Answer 1

cumultive means up to that number
so if is probablites with x out of n
for example is 8 of 10
then the cumulative probablilty
tell you chance of of getting 0,1,2,3,4,5,6,7, or 8 when doing it 10 times

Answer 2

All cumulative distributions are the sum of probabilities up to something. Or, in the case of continuous, integrals.

So, if you do some trial 10 times, the probability of getting a sucess exactly k times is

10Ck*p^k*(1-p)^(10-k)

whereas the cumulative probability is the sum up to and including k

so it's the sum j=0 to k { 10Cj*p^j*(1-p)^(10-j) }

A characteristic of cummulative charts is that they all start at zero and max out at 1. They always increase because probabilites are always positive.

and

P( k1< K