Homework Answers
Answer: D. All of the above
Explanation:
While doing an experiment, we will use both experimental group and control group ( some times two or more independent groups). If results between these groups are significantly different, then we can believe that the difference between the groups are because of the independent variable not because of the errors. To test that whether the results are significant or not , we should do t test. If results are statistically significant then the groups are sigficantly different. If the groups are significantly different, we can reject the null hypothesis.
That's why All of the above is the correct answer.
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