Variables:
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week - Week number.
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day - Day, either Friday or Tuesday.
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n_peop - Number of people associated with the group.
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bill - Total bill for the group.
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tip - Total tip from the group.
Details
This data set was built using simulations of tables, then bills, then tips based on the bills. Large groups were assumed to only pay the gratuity, which is evident in the data. Tips were set to be plausible round values; they were often (but not always) rounded to dollars, quarters, etc.