15) A pollster wants to minimize the effect the order of the questions has on a

Question

15) A pollster wants to minimize the effect the order of the questions has on a person's response to a 15) survey. How many different surveys are required to cover all possible arrangements if there are 6 questions on the survey? A) 6 B) 720 C) 120 D) 36 16) There are 6 members on a board of directors. If they must elect a chairperson, a secretary, and a 16) treasurer, how many different slates of candidates are possible? B) 120 A)720 C) 216 D) 20 Answer the question. 17) If an apple is hanging from a string and three flies land on it, find the probability that all three are 17) on points that are within the same hemisphere A) 0.333 B) 4 C) 0.25 D) 0.125 18) 12 wrestlers compete in a competition. If each wrestler wrestles one match with each other 18) wrestler, what are the total numbers of matches? A) 66 B) 156 C) 78 D) 132 Use Bayes' theorem to find the indicated probability. 19) Refer to the table which summarizes the results of testing for a certain disease. 19) | Positive Test Result Negative Test Result Subject has the disease Subject does not have the disease 91 91 A test subject is randomly selected and tested for the disease. What is the probability the subject doe not have the disease given that the test result is positive? A) 0.646 B) 0.195 C) 0.805 D) 0.123 20) Refer to the table which summarizes the results of testing for a certain disease. 20) Positive Test Result Negative Test Result Subject has the disease Subject does not have the disease 27 301 A test subject is randomly selected and tested for the disease. What is the probability the subject has the disease given that the test result is negative? A) 0.02 B) 0.063 C)0.226 D) 0.98

Explanation / Answer

Q 15

The number of all possible arrangements if there are 6 questions are = 6! =6*5*4*3*2*1 =720

Answer: Option B) 720

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