A therapist claims that a particular technique has been successful in the treatment of eating disorders.You find out that only 7 out of 10 clients were actually helped.What is the probability of observing 7 successes if the probability of success = .5?
A).7
B).5
C).117
D).77

Question

Quizplus · Accepted Answer

The probability of success is 0.5, and the therapist treated 10 clients. The probability of observing exactly 7 successes in a sample of 10 with a success probability of 0.5 is calculated using the binomial distribution formula: P(X=7) = (10 choose 7) * 0.5^7 * 0.5^3 = 0.117. Therefore, the probability is 0.117 or 11.7%.

A Therapist Claims That a Particular Technique Has Been Successful