STAT 1124 Assignment 6 Model Answers

# STAT 1124 Assignment 6 Model Answers - STAT 1124 Section 2...

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STAT 1124 – Section 2 Assignment 6 Due Monday, March 23, 2009 1. An experiment was carried out in order to see what factors are associated with the rotting of tomato during storage. One of the factors considered was the temperature of the storage space, either 8 or 5 degrees C. The extent of tomato rot was rated by three categories, Low, Medium, and High. Results of this experiment are summarized in the following: Temperature Extent of Rot 5 o C 8 o C Low 12 20 32 Medium 8 15 23 High 5 12 17 25 47 72 a. Compute the Chi Square Statistic using the following table: Cell Observed (OC) Expected (EC) OC - EC (OC-EC) 2 (OC-EC) 2 /EC Low/5 o C 12 11.111 -0.889 0.790 0.071 Medium/5 o C 8 7.986 -0.014 0.000 0.000 High/5 o C 5 5.903 0.903 0.815 0.138 Low/8 o C 20 20.889 0.889 0.790 0.038 Medium/8 o C 15 15.014 0.014 0.000 0.000 High/8 o C 12 11.097 -0.903 0.815 0.073 Chi Square Statistic = 0.320 b. Based on the Chi Square Statistic, can you conclude that there is an association between the temperature of the storage space and the extent of rot of the tomato? Please full justify your answer.

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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 Assignment 6 Model Answers - STAT 1124 Section 2...

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