Refer to the following distribution: 
What is the class midpoint for the $45 up to $55 class?
Definitions:
Behavioral Question
A query used in interviews that asks candidates to describe past behavior as an indicator of their future performance in similar situations.
Leadership
The art of motivating a group of people towards achieving a common goal.
Decisive Thinking
The ability to make quick, effective decisions with firmness.
Impression Management
The process by which people attempt to influence the perceptions of others about a person, object, or event by regulating and controlling information in social interaction.
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Q71: The mean of a probability distribution is