STA 210 Lecture 3: Number Sense Part l and ll
16 Feb 2017
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Inference: the process of reasoning from the unknown to the unknown. Example: a jury considering evidence and inferring about guilt of defendant. Example: a politician looking at the poll results and deciding whether she has a chance in the election. Human inference: an off-hand phrase taken here to mean inferences we make from statistical constructs like charts, graphs, numerical summaries . Example: the harry potter and deathly hallows sells 8. 3 million in the first 24 hours, which is more than 50,000 a minute. Our human inference would conclude that the book is incredibly popular. Data/statements can be completely wrong due to an error of a misplaced decimal. Graphs can give us a different illusion than what is actually meant to be said. The human inference could infer something much different. Graphs don"t always show you the increase/decreasejust the steady trend. Also, the spacing can be off on the axis, making the data steeper or not.
