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Instruction 4-8
According to the record of the registrar's office at a university,35% of the students are first-year,25% are second-year,16% are third-year and the rest are doing their honours year.Among the first-year,second-year,third-year and honours students,the portion of students who live in a residential college are,respectively,80%,60%,30% and 20%.
-Referring to Instruction 4-8,determine whether the year level of a student and whether the student lives in a residential college are statistically independent.
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