00:01
So we have that 65 % of the households, and i'm going to go ahead and change that to a decimal, have only one or two people.
00:07
If that percentage is still valid, then what's the probability that we have between 590 and 625 inclusive? so of the next 1 ,000 randomly chosen.
00:25
Well this is going to be a binomial cumulative distribution.
00:28
So we're going to look at this in two parts.
00:30
We're going to have the probability, let's look at this piece, that x is greater than or equal to 590, and then we're going to look at the probability that x is less than or equal to 625.
00:42
Well on the calculator, our cumulative deals with less than.
00:48
So we're going to get the binomial cdf, and now we're going to have our number of items, the probability of success, which is 65.
00:58
Now what we're going to put in here is 625, because it includes that number, and that'll be that one.
01:09
So for this one, we're going to need to look at the probability that x is less than 590...