Random samples were selected from three populations. The data obtained are shown below. Please note that the sample sizes are not equal. 
a.Compute the overall mean 
.
b.At 95% confidence, test to see if there is a significant difference among the means.
Definitions:
Construct System
refers to the collection of interconnected constructs individuals use to make sense of their experiences and guide their behavior.
Unipolarity
A term typically used in international relations describing a distribution of power in which one state exercises most of the cultural, economic, and military influence.
Hostile Manner
Behaving in a way that expresses anger, aggression, or opposition towards others, often creating an unfriendly or antagonistic environment.
Low-Risk Choice
A decision that involves minimal possibility of negative outcomes or loss.
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