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Critics have noted that the advantage its preschoolers gain in test scores fades by third grade, but scholars also have found that Head Start has important impacts on graduates, including lessening the chance that they will be convicted of a crime years later.
Though some gain in test accuracy is achieved, it was at the cost of loss of prediction on part of the patient cohort.
For the data set considered [ 1], there appear to be few anomalous links in the data, so there is at most a small gain in test accuracy when we use these methods.
First, as commented, we investigate whether a gain in test accuracy can be achieved by restricting prediction to a smaller cohort of patients for which high confidence predictions can be made, declining prediction on the remainder.
Theoretically, for each position, a value of 0 indicates a normal copy number (log 2 (2/2)= 0) result, while a log2 ratio of 0.58 (log 2 (3/2)= 0.58) indicates a one copy gain in test compared with reference, and a log2 ratio of −1 (log 2 (1/2)=− 1) indicates a one copy loss in test compared with reference.
To determine whether any gain in test performance from the addition of the second test (hrHPV testing) was greater than that expected if the second test offered no diagnostic information, expected performance characteristics for cytology combined with a random test having the similar prevalence as hrHPV were computed (Franco and Ferenczy, 1999).
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Three years of gains in test scores ensued.
Mr. Klein chuckled at suggestions that the gains in test scores could be attributed to students' mastering the testing process.
This year, the school district boasted the highest gains in test scores of any district in Alameda County.
(Since Bush left office, gains in test scores at all levels have been relatively incremental; graduation rates have steadily increased, but they remain among the nation's worst).
The report, issued annually, cited modest gains in test scores and graduation rates for special education students statewide, though officials acknowledged that the results were "disturbing".
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