A) 0.0264 B) 0.5000 C) 0.0064 D) 0.0328 E) None of the above Marketing Research

Question

A) 0.0264

B) 0.5000

C) 0.0064

D) 0.0328

E) None of the above

Marketing Research (Curry) Binomial Distribution (n= 10; p:02) Probability 1074 .2684 0.2013 0881 0.0055 0008 .0001 o as 10 Total 10000 9 Number of Correct Answers on this Quiz On this quiz, each question has 5 foils (possible answers). Someone who is purely guessing has a 1 in 5 (or 0.20) chance of getting a given question correct. Figure 1 shows the binomial distribution for n=10 (there are 10 questions on this quiz) and p=0.20, what is the probability that a "pure guesser" will get 50% or above on this quiz?

Explanation / Answer

P(50% or above)

= P(5 or more correct answers)

= P(X = 5) + P(X = 6) + P(X = 7) + P(X = 8) + P(X = 9) + P(X = 10)

= 0.0264 + 0.0055 + 0.0008 + 0.0001 + 0.0000 + 0.0000

= 0.0328

Option D is correct.

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