Basic Sampling
the total collection of units or elements you want to analyze.
Population
**DOUBLE JEOPARDY**
When we can specify the (nonzero) probability of each element in the population being selected for membership in the sample.
Probability Sample
________ samples are based on whoever just happens to be available at the particular moment or accidentally walking by the person distributing the survey.
Convenience or Accidental Sampling
when a study is given at one point in time and only once to a particular sample of respondents
Cross-Sectional Study
**DOUBLE JEOPARDY**
topic of chapter 6 in Nardi textbook
Data and Statistics
***TRIPLE JEOPARDY***
the element about which you are observing and collecting data, such as a person responding to a questionnaire, a school, an editorial, or a local business.
Unit of Analysis
Must be able to provide a complete list of all the possible units in the population from which to choose a sample.
Simple random
...also samples of convenience. Those who responded to a sign asking for research subjects
Volunteer Samples
**DOUBLE JEOPARY**
samples of respondents are followed over lengthy periods
Longitudinal studies
**DOUBLE JEOPARDY**
performed the "Charlie Murphy true Hollywood stories"
Dave Chappelle
are what we estimate or infer from sample statistics when we collect data from a sample because we were unable to do a full population study
Population Parameters
With this method you disproportionately categorize your sample along the lines you want to analyze by establishing quotas for certain kinds of respondents.
Stratified random
***TRIPLE JEOPARDY***
...involves designating a group of people for selection because you know that they have some trades you want to study.
Purposive or Judgemental Sampling
2019 Super Bowl Champs
New England Patriots
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Floors in Gruening
what is 8
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..make inferences from a subset population
Sample Statistic
Involves taking every nth element in the sampling frame until the total is reached
Systematic random sampling
**DOUBLE JEOPARDY**
respondents are solicited until the number needed for each of the various criteria are met.
Quota Sampling
caffeine _ _ _
(three letter nickname)
Kev
**DOUBLE JEOPARDY**
The capital of Finland
What is Helsinki
...a difference between the information (the statistics) we gather about the sample and what the true parameters of the population are.
Sampling Error
**DOUBLE JEOPARDY**
Involves randomly selecting units beginning with larger clusters and moving to smaller ones at each stage
Cluster sampling
Each person who volunteers then is asked to pass along a questionnaire to someone he or she knows.
Snowball Sampling
***TRIPLE JEOPARDY***
One kind of longitudinal study involves following the same people and surveying them at different points in time
Panel Study
**DOUBLE JEOPARDY**
The animal that kills the most people per year
Mosquitos