Solve the equation.9 = z + 4

A. {5}
B. {13}
C. {-5}
D. {-13}

Answer: A

Mathematics

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A random sample of 100 people was taken. Eighty of the people in the sample favored Candidate A. We are interested in determining whether or not the proportion of the population in favor of Candidate A is significantly more than 75%. Refer to Exhibit 9-6. At a .05 level of significance, it can be concluded that the proportion of the population in favor of candidate A is

A. significantly greater than 75% B. not significantly greater than 75 C. 96 significantly greater than 80% D. not significantly greater than 80%

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Mathematics