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Stats Ch. 1,2
Stats basics, chapters 1, 2
Question | Answer |
---|---|
Statistics Paradigm | Population -> Sample -> Statistics |
Parameter | measurement of a population |
Statistic | Measurement of a sample |
Error formula | 1/(sq rt of N) |
Variable | something with more than one value (ex age, weight, grade) |
Explanatory Variable | Explains why the study's being done/how groups are broken up |
Mean | Average |
Confidence Interval | is set by the error (percent + and - the error), Usually 95% |
3 Key Components of Statistical Studies | Design (logistics), Description (data), Inference (not in descriptive studies, the outcome; assumed/projected) |
Area under a bell/normal curve | 1 |
Categorical Variable | gender, race, etc |
Numerical/Quantitative Variable | Discrete = integers and continuous = fractions |
Integers | numbers without fractions/decimals |