I only had a short amount of time left to study Statistics in Algebra 1, but I wanted to do what I could. Here is what we focused on.
I can describe the correlation of bivariate data.
This is probably not where I should have started, but since I had seen this post by Mrs. Hester (which led by to this post by Sarah) it was what was on my mind at the end of a long week. So it is what I ended up starting with.
I always break down what "bivariate data" means for students. Then I gave them this document to cut up and sort based on the definitions. Then we discussed and glued it in.
Next day I gave students these scenarios to label with the correlation they would expect to see. I tried to frame it for them like this: "If _________ increases, I would expect __________ to increase/decrease" We always start by thinking of one as increasing, because that is how the definitions start. We sorted these and glued them in after discussing.
I can graph bivariate data.
This should have been first...not sure why I didn't think of it at the time, but it is what it is...
Big starting point here is to define a scatter plot.
Then we did this investigation on height vs. armspan. I've done it twice now, and I like it, but I would like other ideas for bivariate data I can collect immediately from students. Anyone have good ideas?
I then gave handouts for using the calculator to create the graph. I found one for TI-84 here and one for TI-nspire here.
I can find the line of best fit for bivariate data.
We just used the calculator to calculate linear regression. I showed them how and then asked them to write down steps for themselves in their notes.
To sum up the unit I had students complete a project. Basically they had to decide what to collect data on, collect the data, create a scatter plot, and find the line of best fit. Here is my file if you would like it.
That is a brief overview of my brief statistics unit. Hopefully I will expand (a lot) on it next year.
-Kathryn
#MTBoS30
20/30
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