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comment by veen

Rightly so. It's such a hilariously bad graph that I almost thought it was satire when I found it a week ago on HN. Sales from "a store in Silicon Valley"? Axes not starting at zero? C'mon now.





mk  ·  3107 days ago  ·  link  ·  

In all fairness, axes needn't start at zero. That's a design choice, not a statistical one. Sometimes correlation can be hard to visualize without translating axes. Of course, there should be a R value in that graph.

veen  ·  3107 days ago  ·  link  ·  

I agree that it is a design choice, but it obfuscates the scale and indirectly the significance of the numbers used so I generally find it a bad choice. Here's the same graph with axes to zero:

R^2 is 0,44 with n=7 but drops to 0,10 when you leave out the Q1 2016 outlier.

mk  ·  3107 days ago  ·  link  ·  

    when you leave out the Q1 2016 outlier.

The question is: Is it an outlier? If it's the beginning of a change, then it might not be. As I said above, the range needs to be greater. That's why I think Junk Charts doesn't make an effective point by dropping it.

IMO there's nothing wrong with a silly hypothesis, only the poor test of one. 0.44 says it all.

veen  ·  3107 days ago  ·  link  ·  

With n = 7 I agree you can't say with any certainty whether it is an outlier or not. But that is because you can't say anything definitive about this data, period. (It's not a solid proxy for predicting a tech bubble, that's for sure.)

kleinbl00  ·  3107 days ago  ·  link  ·  

I love everything about this deeply dorky conversation.

kleinbl00  ·  3107 days ago  ·  link  ·  
veen  ·  3107 days ago  ·  link  ·  

I will never forget me social media buzz around Paul the Octopus during the World Cup. People will believe the darndest things.

PS. this might just be the best sentence on Wikipedia ever:

    The President of Iran, Mahmoud Ahmadinejad, criticised Paul, accusing him of being a symbol of Western decadence and decay. [29]
kleinbl00  ·  3107 days ago  ·  link  ·  

I want to agree, but I think you're severely underestimating Wikipedia.