STAT 1124 Quiz 3 Model Answers

STAT 1124 Quiz 3 Model Answers - STAT 1124 Section 2 Quiz 3...

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STAT 1124 Section 2 Name: Q u i z 3 S t u d e n t I D : February 24, 2009 Model Answers You have 20 minutes to complete the following: 1. Drilling down beneath a lake in Alaska yields chemical evidence of past changes in climate. Biological silicon, left by the skeletons of single-cell creatures called diatoms, is a measure of the abundance of life in the lake. A rather complex variable based on the ratio of certain isotopes relative to ocean water gives an indirect measure of moisture, mostly from the snow. As we drill down, we look further in the past. It is speculated that the presence of isotope (%) can be used to estimate the abundance of life as represented by amount of silicon. Attached is the data from 2300 to 12000 years ago (Feng Sheng Hu et al, Science, 2003, page 1890-1893): A scatterplot, a subset of a regression analysis output, and a residual plot for the above data were produced. a)
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This note was uploaded on 07/14/2010 for the course STATS 1124 taught by Professor Michael during the Summer '09 term at Langara.

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STAT 1124 Quiz 3 Model Answers - STAT 1124 Section 2 Quiz 3...

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