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Unformatted text preview: STAT 401: Homework 1 3. i. Population of interest: Air in all possible airplanes, Population Unit: Airplane ii. Sample: Measured degree of stalenss on 175 domestic flights. ii. Hypothetical 1. i. The entire customer satisfaction for cars sold during the previous year. ii. Not hypothetical. 4. i. Take a simple random sample from the entire collection of last years customers. This will give an overall picture of the degree of customer satisfaction, but not specific to each type of car. ii. Take a stratified random sample, with car type being the strata. This will provide type-specific information on customer satisfaction, as well as the overall degree of customer satisfaction. 5. No. This is because with this sampling scheme, samples that consist of products with balanced representation of the two production facilities have higher probability, where as in simple random sampling samples that consist of products with 70 % -30% representation of the two facilities have higher probability....
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This note was uploaded on 05/08/2008 for the course STAT 401 taught by Professor Akritas during the Spring '00 term at Pennsylvania State University, University Park.
- Spring '00