A 1 C levels are thought of as an average blood sugar level over the past 3 months. We'd like to determine how much diet affects A 1 C . Eights subjects were put on a strict diet that reduced highly processed carbs. Their A 1 C levels were checked before the diet and then again after they had been dieting for 3 months. The results are shown in the table below. Note that the units of � 1 � is percent. Is there evidence that the diet influenced A 1 C levels? Note that you may answer this question using either a hypothesis test or a confidence interval. If you use a test, show all six steps. If you use a confidence interval, use a 9 5 % interval, list the parameter ( s ) of interest with the associated symbol in words in the context of the problem, write the interval in the double inequality form, and interpret it in addition to answering the research question.
