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University Exams

In: Other Topics

Submitted By princemethos
Words 306
Pages 2
Question #1

1. Assume that you have bought 3 tickets for a local police department lottery and that your brother has bought 2 tickets. You have just read that 1000 tickets have been sold.

a) What is the probability that you will win the grand prize? (1 mark)

b) What is the probability that your brother will win the grand prize? (1 mark)

c) What is the probability that either you or your brother will win? (1 mark)

Assume the same situation except that a total of only 20 tickets were sold and that there are 2 prizes.

d) Given that you don’t win first prize, what is the probability that you will win second prize? (the first prize winning ticket is not put back in the hopper) (1 mark)

e) What is the probability that your brother will win first prize and you will win second prize? (1 mark)

f) What is the probability that you will win first prize and your brother will win second prize? (1 mark)

g) What is the probability that the two of you will win first and second prize? (1 mark)

Question #2

In a study of human cognition, we want to look at recall of different classes of words (nouns, verbs, adjectives, and adverbs). Each subject will be exposed to each condition once. We are afraid that there may be a sequence effect, however, and want to have different subjects see the different classes in a different order.

a) How many subjects will we need if we are to have one subject per order? (2 mark)

Assume that we have just discovered that, because of time constraints, each subject can see only three of the four classes. The rest of the experiment will remain the same, however.

b) Now how many subjects do we need? (1 mark)…...

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