Karteikarten
Statistics 151 - Data Collection
Karten in diesem Stapel (14)
- 1What is statistics?It is the science of data
- 2What are the two systems that make up statistics?deterministic and random
- 3what is deterministic?No matter how many times you do a calculation, the answer will always be the same
- 4What is random?the calculated data can be different every time you try it. e.g. rolling a die
- 5which system do we study in this class?the random system
- 6what is a population?a collection of objects, people, plants, animals, or patients that can be studied
- 7why do we usually only study part of a population by randomly selecting a sample?most populations are two large to study and many would require a lot of money and man power that just isn't available.
- 8What is an experimental study?a form of data collection used mostly by the physical sciences such as biologists, chemists, and medical researchers. use the random selection of individuals to test a treatment through experiments
- 9What is an observational study?a type of data collection used mostly by social sciences such as psychlogy, sociology, and marketing researchers where data is collected using surveys, polls, and marketing research to collect data about the human populations opinions
- 10name some probability samples.systematic, stratified, cluster, and simple random
- 11name some non-probability samples.snowball, quotas, convenience, judgment.
- 12how do you select a sample from a very large population?use of the simple random model, where all individuals have an equal chance of being selected
- 13What is qualitative data?category or group data
- 14what is quantitative data?data that is recorded on a naturally occurring scale.
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- Chemistry 101 Stats 151 Karteikarten am Statistics 151 - Data Collection, erstellt von jennabarnes12387 am 11/12/2013.
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- jennabarnes12387
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