On snow-covered roads winter tires enable a car to stop in, Ask an Expert

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On snow-covered roads, winter tires enable a car to stop in a shorter distance than if summer tires were installed.

In terms of the additive model for one-way ANOVA, and for an experiment in which the mean stopping distances on a snow-covered road are measured for each of five brands of winter tires, differentiate between the use of the terms "effectiveness" and "effect."

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