Assignment task: Think like scientists
Imagine you predict that it will take a salesclerk at a mall longer to help out a potential customer who is dressed in sloppy clothes (untucked t-shirt and torn jeans) than a potential customer dressed in business attire. You run the study and find support for your hypotheses, with the obtained value exceeding the critical value at the p < .05 level. Why wouldn't you want to say that you proved your hypothesis correct? What other reasons might there be to explain your findings?