Suppose thatb if a person travels the europe for the first time, the probability that he will visit london is 0.70; paris is 0.64; rome is 0.58; amsterdam is 0.58; london and paris is 0.45; london and rome is 0.42; london and amsterdam is 0.41; paris and rome is 0.35; paris and amsterdam is 0.39; rome and amsterdam is 0.32; london, paris and rome is 0.23; london, paris and amsterdam is 0.26; london, rome and amsterdam is 0.21; paris, rome and amsterdam is 0.20, and all 4 cities is 0.12. what is the probability that he will see at least one of these four cities?

Two researchers are attempting to create a new psychotherapy protocol that more reduces panic attacks. they believe that they have succeeded and are now in the clinical trial period of their protocol's development. they are working with several cohort groups, some of which have been through the new protocol, while others have done the standard protocol currently recommended. if these researchers are interested in evaluating the difference in the percentage of test subjects who successfully decreased their panic attacks in 2 months on the new protocol versus the percentage of test subjects who successfully decreased their panic attacks in 2 months with the traditional protocol, which of the following statistical tests would be most appropriate? a. analysis of variance (anova) b. correlation c. chi-square test d. paired t-test e. independent t-test