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    Questions in Statistics - What are Type I and Type II errors? Why do you want to avoid them?

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    ? What are Type I and Type II errors? Why do you want to avoid them?
    ? What is effect size and what does it tell you about your findings?
    ? What is power of a statistical test and what factors affect it?
    ? When is it necessary to conduct a t test?
    ? What are the "degrees of freedom"? Why would you use this term instead of N to calculate a sample variance?

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    ? What are Type I and Type II errors? Why do you want to avoid them?

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