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Clinicians recommend that stress levels should be managed within an appropriate range. Research has indicated that normal stress levels in college students should be around a score of 45 on their measure. Researchers were interested in whether a sample of 123 college students had a stress score that was different from the recommended score (of 45). Researchers wanted to test this hypothesis using an alpha level a = .05. a. What type of data/variable/scale of measurement is the variable: Stress_Score? b. What is the null hypothesis? Use proper statistical notation like how we did in class. c. What is the alternative hypothesis? Use proper statistical notation like how we did in class. d. Is this a directional or non-directional test? What is the difference between directional/ non-directional tests