interaction

# interaction - 40 50 30 Use the space on the right hand side...

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Stat 2225 Handout Interaction Plot We are interested to know how starting salary of students depends on discipline (Commerce, Engineering or Statistics) and degrees obtained (bachelor or master). We arbitrarily assign discipline as factor A and degree as factor B. For illustration, the following table lists the starting salary (in thousand of dollars) for the six combinations of factors A and B. For example, the “30” means that a student who finishes a Bachelor in Commerce makes \$30,000 annually. Case 1 : Neither factor A (three levels) nor factor B (two levels) has an effect on the response. Discipline (A) Comm. Eng. Stat. Bachelor 30 30 30 Degree (B) Master 30 30 30 Use the space on the right hand side to draw the interaction plot. Case 2 : Factor A has an effect on the response but not factor B. Discipline (A) Comm. Eng. Stat. Bachelor 40 50 30 Degree (B) Master

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Unformatted text preview: 40 50 30 Use the space on the right hand side to draw the interaction plot. Page 1 of 2 Case 3 : Factor B has an effect on the response but not factor A. Discipline (A) Comm. Eng. Stat. Bachelor 30 30 30 Degree (B) Master 50 50 50 Use the space on the right hand side to draw the interaction plot. Case 4 : Both factors A and B have an effect on the response. No interaction between factors A and B (i.e. working independently). Discipline (A) Comm. Eng. Stat. Bachelor 40 50 30 Degree (B) Master 60 70 50 Use the space on the right hand side to draw the interaction plot. Case 5 : Both factors A and B have an effect on the response. There is an interaction between factors A and B (i.e. not working independently). Discipline (A) Comm. Eng. Stat. Bachelor 40 70 30 Degree (B) Master 80 60 50 Use the space on the right hand side to draw the interaction plot. Page 2 of 2...
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## This note was uploaded on 01/17/2010 for the course STATS 2225 taught by Professor Li during the Spring '09 term at Langara.

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interaction - 40 50 30 Use the space on the right hand side...

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