Adapting, refining and expanding a validated questionnaire to measure food waste in U.S. households.

Those receiving the food waste message responded with a highly significant reduction ( p = 0.006).

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There could be some reduction in reported waste level even in the absence of any messaging focused on food waste, but we only observed close to marginally significant week-over-week reduction among those receiving the placebo message ( Table 5 , p = 0.109).

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Bootstrap analysis suggests a usable sample size of 360 (180 each for the treatment and control condition) is needed to identify marginally statistically significant reductions associated with such interventions, which translates to about 237 per group given the attrition and outlier rates observed among the online consumer panel used in this pilot study.

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Statistical significance is established at the 5% level with significance at the 10% level deemed marginal significance.

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