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I like "E".....if we have reducing no of sharks but the technology to catch them is getting better, u might still end up catching same no of sharks /unit km.net. I think we can safely assume that "shark-fishing" boats r out there to hunt.
D) if there are some catchs with fewer and some with more sharks the average number should level off => weighted average => 6 months lighter shark and 6 months heavier sharks => it should be aproxamately (as it is mentioned in the argument) the same as in 1973 + there is also no reference to the past. how old is the quotas ? 1 day or 7 days or 1 year ?
argument talked about the conclusion that 'the population of that species in the waters around South Australia must be at approximately its 1973 level' based on the evidence that 'The CPUE for any species of shark is the number of those sharks that commercial shark-fishing boats catch per hour for each kilometer of gill net set out in the water'.
Therefore, we must try to accord with the evidence and wean the conclusion at the same time.
E is better, saying that the technology made the catching ability more accurate. Therefore, the decrease in the population of sharks doesn't affect fishers' catch.
choice D talked about the tonnage not meaning the amount.
Check out this awesome article about Anderson on Poets Quants, http://poetsandquants.com/2015/01/02/uclas-anderson-school-morphs-into-a-friendly-tech-hub/ . Anderson is a great place! Sorry for the lack of updates recently. I...