data(example_data_1_subject)
grade_eugly(example_data_1_subject)
grade_eugly(example_data_1_subject, lower = 80, upper = 180)
data(example_data_5_subject)
grade_eugly(example_data_5_subject)
grade_eugly(example_data_5_subject, lower = 80, upper = 160)
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