How many tosses to get a head? When we toss a penny, experience shows that the probability (long-term proportion) of a head is close to 1/2. Suppose that we toss the penny repeatedly until we get a head. We want to know the probability that the fi rst head comes up in an odd number of tosses (1, 3, 5, and so on). To fi nd out, perform 20 trials, and keep a record of the number of tosses needed to get a head on each of your 20 trials. (a) From your results, estimate the probability of a head on the fi rst toss. What value should we expect this probability to have? (b) Use your results to estimate the probability that the fi rst head appears on an odd-numbered toss.

Topics for the Third Exam Theories of Personality -Freud -Adler -Perls -Existential Theories -Erickson -Family Therapy Sigmund Freud -Born in Czechoslovakia, moved to Austria as a child -Family encouraged education, was a very good student -Went to med school to be a Dr., then for Psychiatry to develop theories Freud’s Psychoanalytic Theory *very complicated theory, people often misinterpret it due to lack of knowledge* -The project -the book Freud began to write which contained the theory of personality being based upon the nervous system -The book was never finished because he changed his beliefs on the subject, however it did help to improve later theories that he devel