The statistics professor has kept attendance records and recorded the number of absent students per class.The recorded data is displayed in the following histogram with the frequency of each number of absent students shown above the bars. 
How many statistics classes had three or more students absent?
Definitions:
Common Law
A body of unwritten laws based on legal precedents established by the courts, influencing the governance of certain jurisdictions.
Local Courthouse
A building where judicial proceedings occur, housing courts that deal with legal disputes and administrative matters on a local or municipal level.
State Reporters
Official publications that compile and report the decisions of state courts, serving as a legal precedent for future jurisprudence.
Legal Positivism
A school of thought in law that emphasizes the authoritative and systematic nature of laws, distinguishing them from morals or ethics.
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