These may or may not work on your computer, but they’re very handy for wrapping your head around what we’re doing when we find the regression line/least square line/line of best fit.
Here’s an applet for seeing
what the line of best fit is doing.
And here’s an
interactive explanation of least squares.
Here are some resources we’ll use this week. First, this generator shows
the shape of Chi Square sampling distributions at different degrees of freedom. Next, a dandy p value calculator for the tests we’ve learned this semester. (Also see this Xtranormal animation about statistical power and p-values. Xtranormal was the coolest thing on the internet for a month back in 2011.)
Your instructor will be presenting a paper at a conference in New Orleans that day, so you’ve got a walk! We will have class as usual on Tuesday, April 3, and Exam 3 as scheduled on Tuesday, April 10.
More fun with data! As long as we’re doing t tests, which in this gendered world somehow almost always seems to lead to comparing men and women, you might as well click the picture to see an interesting data visualization about how men and women tend to describe colors.
Here’s a nice discussion of type I and type II errors in statistics and in the justice system.
So much fun with data! Click the map to see what sorts of restaurants show up disproportionately in each of the 50 states.
Here’s something fun: check out these dances about
frequency distributions, sampling and standard error, and variance.