Meaning of "Positively Correlated"

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When you begin talking about data, there are two main types that you normally concern yourself with. Find out about the meaning of "positively correlated" with help from an experienced educator in this free video clip.

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Video Transcript

Hi, I'm Robin Higgins, and this is "the meaning of positively correlated." So, if something is correlated, we usually, we're usually talking about some data, or survey, we did. And, there's two types. So, there's positive and negative. And, so, positive correlation is that two variables, either they both rise together, or they both fall together. So, an example of that is your number of hours spent studying and your grade. So, if you spend more hours studying, then you will get a better grade. These two things are positively correlated. The other type of correlation is negative, which means that as one variable goes up, the other goes down, and vice versa. So, something that's negatively correlated is the number of hours studied and being yelled at for having bad grades. If you study zero hours a week, you are at a very high likelihood of being yelled at for having bad grades. But, as you study more and more hours, that likelihood decreases. Okay, so it's important to remember this very important science phrase which is correlation does not equal causation. So, two things can always be correlated, but actually have nothing to do with each other. So, let's take a study that we could do where we measured the number of babies born per square mile and the number of pigeons, per square mile. Alright, so, if we're in a rural place that's very empty, we're not gonna have that many babies born per square mile. It's a little, start over here, and then, if we increase, by here, we're gonna get to like a city, right, a very condensed area. And, just like that, if we have, if we're in a rural area, there's not gonna be very many pigeons. If we get to New York, or L. A., up here, there's gonna be a ton of pigeons. So, these two things, number of pigeons and number of babies are positively correlated. However, hopefully, you can deduce that there is no causation. Pigeons hanging out somewhere doesn't mean that more babies are gonna be there, nor vice versa. However, they are perfectly, positively correlated. I'm Robin Higgins, and this is "what is positive correlation?"


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