MATH302 STATISTICS QUIZ 2 (Study guide)

1. If A and B are any two events with P(A) = .8 and P(B|A) = .4, then the joint probability of A and B is 2. Sue has 10 pictures but only has space in her apartment to hang 4 of them on a wall. The number of different arrangements of four pictures from a selection of ten pictures is: 3. The probability of an event and the probability of its complement always sum to: 4. If two events are mutually exclusive, what is the probability that both occur at the same time? 5. If A and B are mutually exclusive events with P(A) = 0.30 and P(B) = 0.40, then the probability that either A or B or both occur is: 6. A pet supplier has a stock of parakeets of which 10% are blue parakeets. A pet store orders 3 parakeets from this supplier. If the supplier selects the parakeets at random, what is the chance that the pet store gets exactly one blue parakeet? 7. The variance of a binomial distribution for which n = 100 and p = 0.20 is: 8. A multiple choice quiz consists of 6 questions, each with 4 possible answers. If a student guesses at the answer to each question, then the mean number of correct answers is 9. Find the variance of the following probability distribution. X P(X) 1 0.30 2 0.15 3 0.05 4 0.25 10. One of the requirements for a binomial experiment is that there must be a(n) number of trials. DOWNLOAD FOR MORE SOLUTIONS