Lesson 12: Census and Sampling
October 10, 2016
Mon, Oct 10
Review:
- Exam corrections due now
- Design of Experiments
Presentation:
- Census and Sampling
- Census = attempt to count entire population
- US Census every 10 years
- Most costly non-military federal government operation (except maybe bailing out banks)
- Sample = gather info from a portion of the population
- Sample Types
- Voluntary response sample
- Complete an optional survey
- Inherent bias
- Example: Google Survey
- Simple random sample
- select from a population
- each individual has equal chance of being selected
- Example: random selection of subset of enrolled students
- Stratified random sample
- divide population into groups or strata
- random sampling, equal chance of selection within each group
- Example: random selection within major (30% CIS, 35% Mgmt, 35% Econ)
- Voluntary response sample
- Sample Types
- Census and Sampling Video
- Census = attempt to count entire population
Activity:
- Complete Exercise 3.56 on p. 208
- Identify the population to sample for the following upcoming election issues:
Assignment:
- Read pp. 197-203, Sampling Design