Demonstrations of simple random sample, stratified samples, cluster samples, and multistage samples.

1. OBJECTIVES 1. 2. 3. HW REMINDERS Read 280 - 289 Ch. 12 # 24, 26, 28, 30 HW Discussion Sampling Methods

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3. 01 06 02 03 04 05 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 SRS Every possible sample has an equal chance of being selected Every person, every combination of people, just everything

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5. POPULATION STRATIFIED SAMPLE

6. POPULATION Each cluster is representative of the entire population. CLUSTER SAMPLE

7. HW # 14

8. We need to survey a random sample of 300 passengers on a flight from San Francisco to Tokyo. Name the sampling method described. a. Pick every 10th passenger b. From the boarding list, randomly choose 5 people flying first class and 25 of the other passengers. c. Randomly generate 30 seat numbers and survey passengers who sit there. d. Randomly select a seat position (right window, right aisle, ...) and survey all the passengers sitting in those seats.

9. We need to survey a random sample of 300 passengers on a flight from San Francisco to Tokyo. Name the sampling method described. a. Pick every 10th passenger SYSTEMATIC b. From the boarding list, randomly choose 5 people flying first class and 25 of the other passengers. STRATIFIED c. Randomly generate 30 seat numbers and survey passengers who sit there. SIMPLE d. Randomly select a seat position (right window, right aisle, ...) and survey all the passengers sitting in those seats. CLUSTER