The following data represent the means for each treatment condition in a two factor experiment.Note that one mean is not given.What value for the missing mean would result in no main effect for factor B? 
Definitions:
Trial And Error
A problem-solving method where multiple attempts are made to reach a solution, learning from the mistakes of failed attempts.
Problem Solving
A cognitive process that involves finding solutions to difficult or complex issues.
Framing Information
The way information is presented or structured to influence perception and understanding.
Availability Heuristic
A mental shortcut that relies on immediate examples that come to a person's mind when evaluating a specific topic, concept, method, or decision.
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