“RPSC ASO Part-B – Numbered Ultra Index.” RPSC ASO Part-B – Refined Numbered Ultra Index (Syllabus v2.0) Chapter 1: Collection, Classification, Tabulation, and Presentation of Data 1.1 Collection of Data1.1.1 Primary Data1.1.1.1 Definition and Concept1.1.1.2 Methods of Collection1.1.1.2.1 Direct Personal Interviews1.1.1.2.2 Indirect Oral Investigations1.1.1.2.3 Mailed Questionnaire Method1.1.1.2.4 Schedules sent through Enumerators1.1.1.3 Advantages and Disadvantages1.1.1.4 Key…