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What did I get right and wrong about the first quarter?

I analyze my performance every quarter to see if there is any pattern of error in my analysis. I devised a scoring method analogous to the grade point average system used in most US schools. You can read about the fourth quarter here.

This quarter I made one public release of data here and a semi-public update on the iPhone shipments here.

The resulting scores for both early and late estimates are shown in the table below:

 

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