PhD Final Thesis April 2013.pdf - Anglia Ruskin Research Online

Thesis Keith Gale 2013and 1 to represent the proportion of variance in the dependant variable comparedwith the independent group variable. The formula is:Eta squared = t²t² + (N1 + N2 – 2)Cohen (1998) proposes guidelines for interpretation of the Eta squared values. Theseare: 0.01=Small differences, 0.06=Moderate difference, 0.14=Large difference.8.9.1 Interpretation of variance of engagement transaction cost quotientEta squared for variance = 5.000²5.000² + (60 + 60 – 2)Eta squared for variance = 0.174An independent t-test was used to compare engagement transaction costs for discreteverses framework projects. There was a significant difference in scores for discreteprojects (M=0.224, SD=0.161) and framework projects (M=0.111, SD=0.069), t(118) =5.000, p=0.000). The magnitude of the differences in the means was large(0.174).8.9.2 Interpretation of variance of performance monitoring transaction costquotientEta squared for variance = 1.869²1.869² + (60 + 60 – 2)Eta squared for variance = 0.029An independent t-test was used to compare performance monitoring transactioncosts for discrete verses framework projects. There was no significant difference inscores for discrete projects (M=0.224, SD=0.213) and framework projects179