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Lowering the lead content in gasoline has been accomplished by a nearly 50% decrease in average blood levels of persons in the United States (NHANES II data).
This might, together with the distinctly subnormal fitness levels of persons with CP [ 10], explain why they are at risk of developing an inactive lifestyle.
This involved collecting data from different levels of persons, individuals, groups, and collectives with the aim of validating data through multiple perspectives on the phenomenon, in order to enhance credibility of the results [ 17].
Of note, in this population, the baseline PWV levels of persons with the MetS were on average 12.2 m/s, compared with only 5.2 m/s in our study.
Person separation and reliability indices indicate how well one can discern persons along the measured variable [ 28] and values larger than 2 and 0.8, respectively, imply that the items are sensitive enough to differentiate two levels of persons according to their level of intensity on the construct (high and low scorers) [ 38].
There was a positive relationship between fish consumption frequency and log hair Hg; log hair Hg levels of persons who consumed fish three or more times had higher total hair Hg levels than did women who consumed zero or one to two servings of fish during the past 30 days.
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Diener and Larsen (1984) found substantial amounts of cross-situational consistency in mean levels of person affect.
By calculating a traditional reliability index, however, some information is lost because the possibly varying measurement error is averaged over different levels of person ability.
Because the Rasch model enables consideration of the measurement error (or in other words, the precision of the measurement) at different levels of person ability, we present so-called item information curves that display the information provided by each item at each level of person ability.
Figures 1, 2, 3 and 4 present type I error rate of the four DIF methods across different levels of person and item clustering effects, impact, testlet and DIF contamination when the studied item's difficulty is low.
Figures 5, 6, 7 and 8 present MSE of the four DIF methods across different levels of person and item clustering effects, impact, testlet and DIF contamination when the studied item's difficulty is low.
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