Purchase Incidence of Selected Lunch Foods.
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SD in parentheses, n = number of participants, t = number of transactions. *Chips only sold in grades 7-12. For chips--Control Pre-NRC n = 590/t = 12719, Control Post-NRC n = 578/t = 9970, Treatment Pre-NRC n = 15/t = 316, and Treatment Post-NRC n = 15/t = 265.
创建时间：
2015-12-02
