5. One therapy based on classical conditioning for people with phobias is called systematic desensitization. In this therapy people are taught to relax in the presence of stimuli that used to make them respond with fear. In the population it takes an average of 10 sessions for the treatment to work. The standard deviation in the population is 2.37. a. What proportion of people takes 13 or more sessions to treat their phobias?

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5. One therapy based on classical conditioning for people with phobias is called systematic
desensitization. In this therapy people are taught to relax in the presence of stimuli that
used to make them respond with fear. In the population it takes an average of 10 sessions
for the treatment to work. The standard deviation in the population is 2.37.


a. What proportion of people takes 13 or more sessions to treat their phobias?

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