A1 - Weihan Ni A20252394 MBA 507 Decision Making Assignment...

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Weihan Ni A20252394 MBA 507 Decision Making Assignment 1 2.2 Who: 30 companies What: 401 participation rates Why: The company was concerned whether there is a low 401 participation rates When: ? Where: US How: Sampling from other companies Variable: 401 participation rate, quantitative 2.4 Who: Months What: Money spend on different forms of ADs and sales When: Each month from 2004 to 2006 Where: The U.S. Why: Compare money spent on Ads and sales Variable: Money spent (in thousand) on advertising and sales (in million), quantitative. 2.22 Who: mailings What: the sales in the 4 weeks following each mail, numbers of catalogs, square inches in catalog When: Current Where: US Why: Investigate the relationship among the timing and space of their catalogs and their sales How: Collect internal data Variable: numbers of catalogs, square inches of catalog and sales (in thousand); all quantitative. 2.26 Who: Kentucky Derby race What: date, winner, margin, jockey, winner’s payoff, duration, track condition When: 1911-2007 Where: Churchill Downs Why: examine the trends in the Kentucky Derby. How: Official data kept of each year race Categorical Variable: Winner, jockey, track condition Quantitative Variables: Date, margin (lengths), winner’s payoff, and duration 2.32 Time series, by the months of 2008. 3.4
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(a) Cluster sampling. Each team is a cluster. (b) Yes, randomly, selecting players is much difficult than selecting teams. 3.6 (a) Multistage sampling. The countries are clusters, and a random sample is drawn in each cluster. (b) Population size does not affect the result of the survey, but sample size does. 3.10 (a) Population: the US adults (b) Population parameter of interest: those who believe in global warming (c) Sampling frame: the US adults aged 18 and older (d) Sample: 1007 randomly selected adults (e) Sampling method: ? (f) Bias: None 3.20 (a) Voluntary response. Only those who have strong feelings will call. (b) Voluntary response sampling; the conclusion drawn from people attend the meeting can be biased,
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This note was uploaded on 11/07/2011 for the course ECON 101 taught by Professor Johnson during the Spring '11 term at Sciences Po.

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A1 - Weihan Ni A20252394 MBA 507 Decision Making Assignment...

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