SP3B_EC41_W09

# SP3B_EC41_W09 - EC 41 UCLA Sample Problems #3b Regarding...

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EC 41 UCLA – Sample Problems #3b These problems will NOT be collected or graded, but they will be useful for studying for exams. 1) The table below gives counts for a sample of 100 people: Weight: Low High Height: Low a b 50 High c d 50 50 50 100 Find two different possible combinations for a, b c, d below. a) No relation between Low and High b) Direct, “positive” relationship between Weight and Height Weight and Height (conditional probability of High Height is larger if High Weight) a = b = a = b = c = d = c = d = c) in part b what must be true of product ad compared to bc? 2) In a city election some of the ballots can not be counted because the “chads” were not completely punched out. The table below gives the party of registration for voters whose ballots were or were not counted. Ballot (1000s): Democrat Republican Counted 79 90 Not Counted 21 10 Suppose the results differ between the northern and southern sections of town. Disaggregated results are:

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## This note was uploaded on 03/07/2010 for the course ECON 41 taught by Professor Guggenberger during the Spring '07 term at UCLA.

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SP3B_EC41_W09 - EC 41 UCLA Sample Problems #3b Regarding...

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