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Reported disturbance of dreams among boys, using labels A, a etc
DreamData
A contingency table with 5 rows and 4 columns
Age group: 5-7 (A), 8-9 (B), 10-11 (C), 12-13 (D), 13-14 (E)
Severity of disturbance of dream: lowest (a) to highest (d)