Hi Mike,

I've been following Steve Morlidge's work and was so happy to run across your blog walking through the maths.

I'm "trying this at home" and strugling with the Squared Naive Error and Squared Error columns in your example. Is there an error in your squaring formula? Given the first week's absolute naive error of 43, I was expecting the Squared naive error to be 1849. Likewise for the absolute error and squared values. I expected 23 & 529.

Is this a mistake in the example table or am I missing something?

Thanks in advance for your response,
Lawrence