9. Each student in a science class of 25 performed the same experiment. Each student shares their data and it is recoded on a class data table. Tamara compared the data
that she personally collected in her experiment to the data collected by the rest of
her classmates. Which of the following might indicate to her that her results are
valid? ve
A. Many other students recorded data similar to hers.
B. Three other classes performed the same experiment.
The same experiment was repeated two years in a row.
D. Another student in her class reached a different conclusion.