Word: peterson
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...last week's press release by Mathematica called the validity of the study into doubt, questioning Peterson's use of data. The release prompted Kate Zernicke's article, "New Doubt is Cast on Study that Backs Voucher Effects," in Friday's Times...
...Peterson said some questions do remain over exactly how to interpret the data from his study, but added that there is no controversy over the importance of the findings to the voucher debate...
...York, black students' test scores over the grades analyzed rose four percent. This number, Peterson said, is not and should not be under debate...
...Those findings are not in any way disputed by Mathematica. They agree that the effects in New York were statistically significant," Peterson said...
...Peterson, the dispute remains a question only of technicalities...