00:01
So i definitely need the table here in order to answer these questions and there's just going to be a lot of addition going on and the probability that x is equal to that x quantity and it looks like it's in blue so i'll write in blue as well.
00:19
.16, .13, .32, .17, .12, as well as .10.
00:34
So getting into the first question, the probability that our outcome is less than or equal to zero, we want all of these bits and i'm adding them together.
00:44
So i'm just going to go into a calculator and do .16 plus .13 plus .32 plus .17 and i get .78 and that makes sense to me because what i could have also done, i'll go ahead and put or, i could have done 1 minus .12 and .1 because i could have just removed those two.
01:09
But let's look at b, probability that our event is less than or equal to negative three.
01:18
Well now we're just looking at, i'll just write it .16 and .13 which is .29 and then letter c, we want the probability that we are between negative two and two and so we're looking at that .32 number, that .17 and the .12.
01:44
So definitely using a calculator for some of these...