A therapist goes through her records and finds that 200 of her 400 patients showed significant improvement in mental health over the past year.Hence,the probability of her patients showing significant improvement in mental health is ______.
A) .05
B) .50
C) 200
D) 400

Question

Quizplus · Accepted Answer

The probability of her patients showing significant improvement in mental health is calculated by dividing the number of patients who showed significant improvement in mental health over the past year by the total number of patients, which is:

200/400 = 0.50 or 50%

Therefore, the best choice is B.

A Therapist Goes Through Her Records and Finds That 200