The same five students were tested before and after taking a class to improve their study habits. They were given articles to read which contained a known number of facts in each story. After the story, each student listed as many facts as he/she could recall. The following data was recorded. What is the non-directional null hypothesis in terms of the variables in the study?

Study A. The same five students were tested before and after taking a class to improve their study habits. They were given articles to read which contained a known number of facts in each story. After the story each student listed as many facts as he/she could recall. The following data was recorded. Person Baseline After Training Difference Difference2 10 15 25 12 14 4 U A W N - 14 17 16 17 12 20 18 Sum 64 83 19 103 Average 12.8 16.6 3.8 20.6 Refer to Study A. What is the non-directional null hypothesis in terms of the variables in the study? (1 pt)