00:01
All right, so today we're looking at the correlation between lego set prices and the number of pieces in the set so and we're gonna use statcrunch to do this and let's go ahead and get the data set so we're gonna first thing you do is go to statcrunch do a little search for lego prices data set these are the sets and they're the same set and you get there you're gonna see all this data, but we don't want all that data the only thing we're looking at is price and pieces that's all we're looking for and so we're gonna just copy that and just click and drag the whole thing's click and drag up to the from the top all the way to the bottom just click price and bring it down all the way to the bottom and then you're gonna copy that now the prompt said there were 157 items in the set but there's a piece of be more 427 so copy that and then you go over to this new window and then you just paste it in here you have to highlight the column heading and then paste and i've already done it.
01:14
So that's what you get.
01:15
Anyway, there's that now we're gonna form a scatter plot.
01:19
So you go to graph you go to scatter plot and we're going to select the x variable to be pieces and the y variable to be price which makes sense that the price would be dependent upon the number of pieces that makes that's a reasonable guess there reasonable connection so now here's the scatter plot and let's put it over here so we can take a look at and write on it so here's our plot and we're gonna know what does this tell us about the relationship between? pieces and price.
01:52
Well, there appears to be a pretty strong linear trend, especially here in the lower number of pieces and there's when there are fewer pieces right.
02:02
It's really cluster on the line that shows a a strong positive linear relationship well, it does get a little more varied as we increase the number of pieces it almost has a parent an appearance of it like kind of going up like this and then almost curving but if we're looking at linear, you know, this is you know it's definitely linear in this lower end a number of pieces, but does kind of spread out a bit more but well, well, there's a numerical way we can talk about the relationship between these variables now we're gonna get the correlation coefficients.
02:53
Let's go back to our data.
02:54
So we go to stat regression simple linear...