Data on the change in the cost of tuition, a shared dormitory room, and the most popular meal plan from one academic year to the next academic year for a sample of 100 public universities are collected.Below is the boxplot for the change in cost in dollars.The distribution of the change in cost is 
Definitions:
Productivity
The efficiency with which input resources are converted into outputs, often measured as the ratio of output to input in a given time period.
Law of Diminishing Returns
The principle that as investment in a single factor of production increases, holding all others constant, the incremental gains in output will eventually decrease.
Law of Diminishing Marginal Utility
states that as a person consumes more of a good or service, the utility (satisfaction) gained from each additional unit decreases.
Principal-agent Problem
A dilemma occurring when one person or entity (the agent), is able to make decisions on behalf of, or that impact, another person or entity: the principal.
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