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Unformatted text preview: Practice Problems 1. A business executive asks her secretary to call 3 different travel agents and find out what price they can get on tickets of 5 airlines to a specified destination. The secretary gets the following information: Travel Airline Agent 1 2 3 4 5 1 128 121 159 116 171 2 123 113 158 106 165 3 121 111 166 102 150 At the 0.05 level of significance, is there a significant difference in ticket prices among travel agents? Airlines? [ Hint: SSTotal = 8408. ] 2. A twofactor analysis of variance experiment was performed with I = 2, J = 3, and K = 4 ( a 2 3 factorial experiment with 4 replicates ). ANOVA table: Source SS DF MS F Factor A 4 _____ _____ _____ Factor B 18 _____ _____ _____ Interaction 12 _____ _____ _____ Error _____ _____ _____ Total 70 _____ a) Complete the ANOVA table. b) Conduct the tests of factor interaction and main effects, if appropriate, each at a 5% level of significance. 5% level of significance....
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This note was uploaded on 02/10/2009 for the course STAT 420 taught by Professor Stepanov during the Spring '08 term at University of Illinois at Urbana–Champaign.
 Spring '08
 STEPANOV
 Statistics

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