Last school year, the student body of a local university consisted of 30% freshmen, 24% sophomores, 26% juniors, and 20% seniors. A sample of 400 students taken from this year's student body showed the following number of students in each classification. 
We are interested in determining whether or not there has been a significant change in the classifications between the last school year and this school year. The expected number of freshmen is
Definitions:
Tournament Game
A competition involving a series of games or rounds, where the outcome determines the advancement to subsequent rounds.
Effortful Processing
A type of information processing that requires attention and conscious effort in order to encode or remember information.
Mental Image
A representation of sensory information in the mind, which is not currently being perceived, such as visualizing an object, sound, or situation.
Street Corner
Literally, the point at which two streets meet; often used to denote a specific location within an urban area.
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