Refer to the following distribution: 
What is the class midpoint for the $45 up to $55 class?
Definitions:
Gender Differences
The distinctions in characteristics, behaviors, roles, and cultural expectations traditionally associated with being male or female in a society.
Meta-analysis
A statistical analysis that combines the results of multiple scientific studies to arrive at a conclusion that has greater statistical power.
Urban Overload
The overwhelming experience caused by the dense concentration of people, noise, and activity in city environments, which can lead to stress.
Screaming for Help
A vocal expression seeking assistance or rescue, typically used in situations of distress or danger.
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