The mean mass of the puppies at five months is 4.35 kg. The masses follow the normal distribution. In an effort to increase their mass, a supplement is added to their daily meals. The subsequent masses of a sample of five-month-old puppies were (in kilograms):

At the 0.01 level, has the supplement increased the mean mass of the puppies? Determine or estimate the p-value.

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4.33 4.37 4.40 4.35 4.30 4.39 4.36 4.38 4.39 4.41