The student is conducting a nutrition experiment using lab rats. One group (control group) is fed a normal diet, while the other group (experimental group) is fed a diet high in protein. There were 30 rats total used in the experiment. At the end of the experiment, the average mass (weight) of a rat in the control group was 60.4 g while the average mass (weight) of a rat in the experimental group was 0.0689 kg. What is the average difference in weight between the two groups in grams?

8.5 g

Explanation:

Average weight of rats in the control group = 60.4 g

Average weight of rats in the experimental group = 0.0689 kg

0.0689 kg = 0.0689 x 1000 g

                       = 68.9 g

Average difference in weight between control and experimental group = Average weight of rats in experimental group - average weight of rats in control group

               = (68.9 - 60.4) g

                         = 8.5 g

Therefore, the average difference in weight between the two groups in grams is 8.5.

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