Suppose the p.d.f. Finally, we learn different types of data and their connection with random variables. What is the probability that our random variable uniformly distributed on this segment has value that is less than, for example, some value here? Level charts. So basically, if we have some point here x, then we have this ray from x to negative infinity, and CDF of x is the probability that X capital is somewhere inside of this ray. Again, we can consider different distributions, and these different distributions will have different CDFs. We'll introduce expected value, variance, covariance and correlation for continuous random variables and discuss their properties. Let me assume that this variable takes value 1 with probability 0.2, takes value 2 with probability 0.5, and takes value 2.5 with probability 0.3. What about these points from here to here? Cumulative Distribution Function ("c.d.f.") To the point with no fluff.\n\nThe professor explained everything in just the right amount of detail and the inclusion of python is great too. Again, $$F(x)$$ accumulates all of the probability less than or equal to $$x$$. We can write cumulative distribution function for these new variable as well. variable whose values are determined by random experiment. What is probability that x is less than or equal to 1? We see that x cannot be less than 1, but it can be equals to 1. Let's return to the example in which $$X$$ has the following probability density function: What is the cumulative distribution function $$F(x)$$? \frac{1}{2}(x+1)^{2}, & \text { for }-1