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| eatmyshorts com , pmoi, celebrity, our dumb century, infographic, college fuckfest , star wars, interracial milf sex , weekend magazine, bill o'rielly, congress, intelligent design, smoove b, o'rielly, pics, | We created nonresponse weights inversely proportional to the probability of enrollment, as indicated by this equation. After application of these weights, there was still a slight sample bias, relative to US population statistics. Therefore, we also created poststratification paysitepreviews weights, to bring our data more closely in line with US figures.29 Table 1 shows that the combined weights corrected the racial bias and adjusted other key sample characteristics. Therefore, all subsequent analyses used these weights. View this table: [in this window] [in a new window] paysitepreviews TABLE 1. Effect of Weights on Baseline Sample Characteristics (n = 2003) paysitepreviews Imputation A small number of respondents had missing data for 1 predictor variables. |
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| A multivariate logistic regression analysis predicting attrition on the basis of 32 star wars baseline characteristics was nonsignificant, indicating no bias in our sample attributable to this factor. A similar analysis predicting nonresponse at baseline from information provided by the supplier of our sample and a brief nonresponse interview with parents star wars identified 3 predictors of failure to enroll in the study. There was a trend toward higher response rates in tracts with higher proportions of African Americans and among households in which an adolescent 12 to 14 years of age was present but star wars not randomly selected. We also obtained lower response rates when a boy >14 years of age was randomly selected for sampling. |
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