Flashcards
Chapter 1: Intro to Stats
Flashcards do conjunto (15)
- 1Populationa total set of observations that can be made
- 2Sampleset of observations drawn from a population
- 3Censusa study that obtains data from every member of a population
- 4Parametera measurable characteristic of a population, such as a mean or a standard deviation
- 5Statistica characteristic of a sample. Generally, a statistic is used to estimate the value of a population parameter
- 6Qualitative(categorical) variables with values that are names or labels.
- 7Quantitativevariables are numerical and represent a measurable quantity
- 8Nominal Levela type of measurement scale. Values represent a descriptive category, but have no inherent numerical value with respect to magnitude.
- 9Ordinal Leveleach value has a unique meaning, and it has an ordered relationship to every other value on the scale.
- 10Interval Levelmeasurement scale that is characterized by equal intervals between scale units.
- 11Ratio Levelequal intervals between scale units and a minimum scale value of zero
- 12Observational Studyresearcher is not able to control (1) how subjects are assigned to groups and/or (2) which treatments each group receives to understand cause-and-effect relationships
- 13Experimentcontrolled study in which the researcher attempts to understand cause-and-effect relationships. The study is "controlled" in the sense that the researcher controls (1) how subjects are assigned to groups and (2) which treatments each group receives
- 14Placeboneutral treatment that has no "real" effect on the dependent variable
a subject's positive response to a placebo is called the placebo effect - 15Confounding Variable
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- FlashCards sobre Chapter 1: Intro to Stats, criado por Anthony Bustamante em 07-02-2017.
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- Anthony Bustamante
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