13In a study to determine the effectiveness of pain management therapy in persons with chronic pain, twenty individuals experiencing chronic pain were randomly selected. Ten of these individuals were randomly assigned to receive pain management therapy and the other ten to receive no therapy. Descriptive statistics for each group are provided below. A t test was Conducted, and the data is below.

No Pain Pain Management Therapy Management Therapy (Sample 1) (Sample 2) X, = 72 X, =53 $1 =9.7 S, = 6.4 1 = 10 1, = 10 ST. -X. =3.675, ED =25, ED =120