need help in this question 1)A company claims that its new viral vaccine is 90% effective in preventing a contagious viral disease. Suppose that in a clinical trial with 3000 respondents, 2640 did not get infected by this disease.  Which is an appropiate test? a)No answer text provided. b)left-tailed z-test c)two-tailed z-test d) right-tailed z-test

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