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    How is conditional main effect interpreted when there is interaction?

    I have a question about multiple regression. May I kindly ask how should I interpret the conditional main effect when the interaction is 0 and the coefficients have opposite signs, more specifically if one of the interaction term contains zero such as angle or time. Please see an example...
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    How to interpret coefficients for multivariate regression model if main effect is either significant or not while the interaction is significant?

    Dear All, I have performed multiple regression model which consists of main effects and interactions. May I kindly ask how should I interpret the equation in case the main effect is either not significant or significant while interaction is significant. Please see my end model and equations...