00:01
All right.
00:01
So number one, this is a binomial distribution, with a probability of, or a sample size of 50, and a probability of 0 .41.
00:15
Number two, the probability that at most, 20 of them.
00:20
So what i'm going to do is i'm going to do a binomial cdf with n being 50, p being 0 .41, my lower bound being 0 .40.
00:30
And my upper bound.
00:32
And i'm going to calculate that in my calculator.
00:39
So binomial cdf.
00:41
There are 50 trials.
00:42
Probability of success is 41%.
00:45
And i want to add up the probability of zero, probability of one, probability of two, all the up to the probability of 20, and then sum all of those up.
00:51
0 .503 -473.
00:55
Number three, the probability that x is greater than or equal to 15.
00:59
Same thing.
01:00
The only thing that's going to change is my lower and upper bounds for my binomial cdf.
01:04
P is point 41.
01:07
My lower is 15 and my upper is 50, which is the maximum here...