Epi/Biostats
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| What is a Type I error | Alpha error - Stating there is a difference when there isn't one
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| what is "p" | the probability of making a type I error (usually <.05)
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| What is a Type II error | Beta error - Stating that there is not a difference when there actually is one.
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| What is power | (1-Beta) - probability of rejecting null hypothesis when it is in fact false, or the likelihood of finding a difference if one actually exists.
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| what is accuracy? | How centered they are to the bulls-eye
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| What is precision? | How close they are to each other
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| what is random error? | reduced precision in a test
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| what is Systematic error? | reduced accuracy in a test
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| What do you use the t-test for | Checks the difference between the MEANS of 2 groups
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| What do you use ANOVA for? | Checks the difference between the MEANS of 3 of more groups
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| What is the Chi-square test used for? | Checks the difference between 2 or more percentages or proportions of categorical outcomes (not mean values)
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