Validity involves the notion of whether the research measured what was intended to be measured. In other words, does the research tell marketers what they need to know?
121, 240, 386, 555, 751, 976
132, 231, 396, 620, 924, 1287
115, 138, 163, 190, 220, 250
3 5 9 17 32 65
...12, 10, 23, 65, 265, 1289
131, 132, 140, 166, 231, 356
38, 54, 73, 95, 135, 196
74, 79, 86.5, 101.5, 109, 124, 141.5
35, 44, 28, 53, 19, 66
56, 69, 90, 119, 156, 208