The Signal and The Noise: Difference between revisions
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| Line 4: | Line 4: | ||
;Out of Sample | ;Out of Sample | ||
:When the conclusions you're drawing from data are inaccurate because the samples do not accurately represent the context in which you are predicting. | :When the conclusions you're drawing from data are inaccurate because the samples do not accurately represent the context in which you are predicting. | ||
;Accurate and Precise | |||
:Accuracy is how far the mean of your prediction is from reality | |||
:Precision is the standard deviation of your predicitons | |||
[[Category:Notes]] | [[Category:Notes]] | ||
Revision as of 20:50, 15 April 2013
Introduction
Prior to the printing press, a book cost about 1 florin (gold coin ~$200) per 5 pages. The printing press instantly brought the price down to around $0.70 / 5 pages. He ties the rise in Renaissance warfare to the printing press and printing of religious books, I'm not sure I agree with that.
- Out of Sample
- When the conclusions you're drawing from data are inaccurate because the samples do not accurately represent the context in which you are predicting.
- Accurate and Precise
- Accuracy is how far the mean of your prediction is from reality
- Precision is the standard deviation of your predicitons