So, you can't conclude anything. The results are inconclusive. Time to take a time out to test your understanding of statistical significance. That is, the goal is to find rules that will allow us to understand and control behavior. If it is extremely unlikely that the results are due to chance alone, we conclude that the treatment was at least partly responsible for the differences between the two groups.
Some field research is experimental because it involves randomly assigning people to groups.
We have to do statistical tests to see if our treatment had an effect. We can't just say the treatment had an effect because the treatment group scored higher than the control group. Take time out for another ungraded quiz . Explain why the case study illustrates the value of having a control group. Explain why the null hypothesis can't be proven right.