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21 Cards in this Set
- Front
- Back
Descriptive Statistic |
Collection, organization, summarization andpresentation of data. This can be done numerically or graphically |
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Inferential Statistic |
Generalizing from samples to populations: reachconclusions about a set of data based on a subset |
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Experiment |
Process produces single outcome. Result cannot be predicted with certainty |
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Experiment Design |
Plan to perform an experiment in which variableof interest is defined. 1 or more factors are manipulated to see the impact onthe variable of interest |
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Close-end |
list of defined choices |
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Demographic |
relating to respondent's characteristics |
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Open-end |
Freedom to respond |
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Bias |
Effect alters statistical result bysystematically distorting it; different from a random error |
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Internal Validity |
data collected in such a way to eliminate theeffects of variables within the experimental environment not of interest to theresearcher |
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External Validity |
results can be generalized beyond the testenvironment -> the outcomes can be replicated when the experiment isrepeated. |
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Convenience Sampling |
techniques that selects the items from the pplt based on accessibility and ease of selection |
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Simple Random Sampling |
method of selecting from a pop that everypossible sample of a specified size has an equal chance of being selected |
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Stratified Random Sampling |
dividing pops to strata, each pop item belongsto only one stratum |
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Systematic Random Sampling |
involves selecting every kth term in the pop after arandomly selected point between 1 and k |
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Cluster Sampling |
pop divided into groups or clusters intended tobe mini population. Simple random sample of m cluster is selected. |
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Quantitative/Qualitative |
Numerical/Categorical |
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Time-series |
consecutive data values observed at successivepoints in time |
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Cross-sectional |
a set of data values observed at a fixed point |
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Nominal Data |
Categorical Codes, ID, Name |
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Ordinal Data |
Rankings, Ordered Categories |
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Ratio/Interval Data |
measurements, can be measured on different scale |