The article The Accuracy of Stated Energy Contents ofReduced-Energy, Commercially
Chapter 9, Problem 79(choose chapter or problem)
The article The Accuracy of Stated Energy Contents ofReduced-Energy, Commercially Prepared Foods (J. of the Amer. Dietetic Assoc., 2010: 116123) presented the accompanyingdata on vendor-stated gross energy and measuredvalue (both in kcal) for 10 different supermarket conveniencemeals):Meal: 1 2 3 4 5 6 7 8 9 10Stated: 180 220 190 230 200 370 250 240 80 180Measured: 212 319 231 306 211 431 288 265 145 228Carry out a test of hypotheses based on a P-value to decidewhether the true average % difference from that stated differsfrom zero. [Note: The article stated Although formalstatistical methods do not apply to convenience samples,standard statistical tests were employed to summarize thedata for exploratory purposes and to suggest directions forfuture studies.]
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