Holiday traditions prove to be more important during recession
16 Nov '09
3 min read
set to ensure reliable and accurate representation of the total U.S. population ages 18 and over. Results of any sample are subject to sampling variation. The magnitude of the variation is measurable and is affected by the number of interviews and the level of the percentages expressing the results. In this particular study, the chances are 95 in 100 that a survey result does not vary, plus or minus, by more than three percentage points from the result that would be obtained if interviews had been conducted with all persons in the universe represented by the sample.