A group of clients requesting marital therapy were given communication skills training and then rated by independent observers before and after therapy on their ability to resolve problems in a series of hypothetical conflict situations. The results are shown below. A higher score indicates better performance on the task. 
a. What is the value of T obt ?
b. What do you conclude using a = 0.05 2 tail ?
Definitions:
Hypokalemia
A medical condition characterized by lower-than-normal levels of potassium in the bloodstream, which can affect heart and muscular function.
Laxatives
Substances that promote bowel movements and are used to treat or prevent constipation, often by softening stools or increasing their passage through the bowels.
Refeeding
The process of gradually reintroducing food after a period of malnutrition or starvation, aiming to prevent refeeding syndrome.
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