Relevant xkcd
It took too long for me to realize it was the same data.
Unless you're in a college statistics course, then if your line is off by a pixel your grade drops a full letter.
Just saw the scatter plot and line and my mind immediately screamed "bullshit" without knowing what this was about at all. Only then I read the text.
Label your x and y, you dirty heathen. Such offense, you're lucky you're not catching a b&.
Look at that choice of axis scale tho
Could be valid. Now if it had been logarithmic the pro tip might still be true, since many don't look at the axis either.
What's the r² on this, like ... 0.3 ish?
Less?
My guess is lower. I'd put the correlation at about -.35 to -.45, so that'd correspond to an R² of .1225 to .2025. But eyeballing correlations is hard.
Assuming it's a correction line, I don't think you can tell from the slope of that line alone as the clustering will matter and correlations are finicky. Now, if it was a regression coefficient, that sexy line can be calculated just by looking at it (although we'd want to know if it was significant, lol).
I was assuming its a simple linear regression fit, and attempting to eyeball the r², haha.
Actual graph used to inform government decisions
Nobody questioned Hubble so why would they question you?
Zoom out so it looks better.
