Karteikarten
Research CAM102
Karten in diesem Stapel (11)
- 1What are the defining characteristics of a variable?An attribute describing an entity of interest
Can vary from one entity to another - 2What is confounding?When it is difficult to eliminate plausible alternative explanations for an observed relationship
- 3Explain internal vs external validityInternal - degree to which correct causal conclusions can be made
External - extend to which conclusions can be applied to real-world settings - 4What is inference?Drawing conclusions about a population based on data
- 5What is the difference between one- and two-sided alternative hypothesis?One-sided is directional where as two-sided is just alternate to null hypothesis
- 6What is a test statistic?A single value linking the data with the null hypothesis
- 7What is a p-value?The probability of getting the test statistic or a more extreme result (in the same direction) if the null hypothesis was true
- 8What are the conventional p-value interpretations?1-0.1: resonable
0.1-0.05: weak evidence against
0.05-0.01: moderate evidence against
0.01-0: strong evidence against - 9Does a p-value show whether a difference is important?No, it merely can suggest whether a difference is likely to exist, the difference could only be 4.9 compared to 5
- 10What are point estimates and what should they be accompanied by?An estimated parameter of a population (mean, median, rate etc), should be accompanied by a measure of uncertainty
- 11What is a confidence interval?A range of values believed, with a given probability, to contain the true parameter
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- CAM102 Karteikarten am Research CAM102, erstellt von Krümpian King am 22/10/2018.
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- Krümpian King
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