00:01
So in this clash we're assuming the 72 % of american voters are in favor of a carbon tax.
00:06
So we can say that this is the probability of select someone in the population that is in favor of carbon tax.
00:16
So if you select in this case six people from the six voters in the united states, we want to determine then in item a, what is the probability? and let's say the x is the number of voters here in this sample of 6 that was selected, in the sample that are in favor of a carbon text.
00:50
That's the variable that we interest in.
00:53
And in item a, we want to know what is the probability that out of those 6, four of them will be in favor of a carbon text.
01:01
So in this case, to find this one, because we have the number of people out of six that have this characteristic here, and we know the probability of select someone with that characteristic in the population, we can say that the distribution of this random variable is binomial, with parameters n equals to six, and probability of success, 072.
01:32
So if this information, we can use the formal for the binomial.
01:36
So this one is the same as how many ways or the combination of selecting 4 out of 6.
01:43
Then we have the probability of having someone that is in favor of carbon text.
01:49
And in this case, we want 4 of them to be.
01:51
And then we multiply this by 1 minus this probability here, so 028.
01:57
And this is for the last, and the other two people...