Personal interviews allow greater opportunity to establish rapport with the respondent than either mail or telephone.
3, 15, 35, 63, 99, 143
66, 115, 34, 155, 14, 211
22, 23, 31, 57, 122, 247
3, 8, 28, 88, 258, 648
A-5, A, 35, 52, 78, 115
7, 22, 68, 207, 620, 1880
463, 430, 369, 310, 243, 168
92, 88, 79, 63, 40
5000, 4050, 3240, 2268, 1360.8, 680.4
124, 132, 118, 140, 108, 148