The goal of a study conducted by Meshack and Norman (A-27) was to evaluate the effects of

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The goal of a study conducted by Meshack and Norman (A-27) was to evaluate the effects of weights on postural hand tremor related to self-feeding in subjects with Parkinson’s disease (PD). Each of the 16 subjects had the tremor amplitude measured (in mm) under three conditions: holding a built-up spoon (108 grams), holding a weighted spoon (248 grams), and holding the built-up spoon while wearing a weighted wrist cuff (470 grams). The data are displayed in the following table.

Can one conclude on the basis of these data that the three experimental conditions, on the average, have different effects on tremor amplitude? Let Determine the p value.

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