A machine is set to fill a small bottle with 9.0 grams of medicine, A sample of eight bottles revealed the following amounts (grams) in each bottle. 9.2 8.7 8.9 8.6 8.8 8.5 8.7 9.0 At the .01 significance level, can we conclude that the mean weight is less than 9.0 grams? How many degress of freedom are there?

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