9. Dr. Wilson discovers a new chemical that he predicts will increase energy levels in hamsters. He designs an experiment to test his prediction
Dr. Wilson
the 12 hamsters into two equal groups. He gives one group of
hamsters the chemical but does not give the chemical to the other group. He keeps
everything else about the hamsters' living environment the same.
Over the next month, Dr. Wilson measures the time that the hamsters spend running on
their exercise wheels each day. He then calculates averages for these measurements,
which are shown in the table.
The data that Dr. Wilson collects during his experiement