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Vet401 Lect66 Flashcards | StudBud
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Vet401 Lect66
Vet401 Lect66
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Questions
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Answers
1
Choose the INCORRECT answer regarding a case control study
We would never calculate risk of disease in a case control study
Enrolls cases with disease of interest and controls who are at risk
We can ask what proportion of cases are exposed
A case control study is an experimental study
2
When the P value is insignificant, we would assume that the null hypothesis is incorrect
False
True
3
Why might a test not pick up differences in a group when differences do exist?
The test is not powerful enough and needs a larger sample size
The test is not powerful enough and requires a smaller sample size
The test is accurate in that there are no differences
The test was performed and data was collected incorrectly
4
A type 1 error occurs when we reject the null hypothesis and say that there is a significant difference when there isn’t
True
False
5
The P-value is the probability of
Rejecting our null hypothesis given the data collected from the study
A true null hypothesis given the data collected from a study
Doing a study and obtaining the data actually collected
A false null hypothesis given the data collected from the study
6
How do you calculate risk ratio?
False
True
7
The previous question is an example of a Type 2 error: test cannot find differences when they are present due to power
True
False
8
Our goal is to get data that allows us to accept our null hypothesis
True
False
9
We should assume that the null hypothesis is:
True
False
10
Statistics significance may be unimportant but statistical non-significance may still be important
False
True
11
When we obtain a high P-value, this tells us that the data…
Is unlikely to be observe
Is plausible and compatible with the null hypothesis
Is compatible, but not plausible with the null hypothesis
Forces us to assume the null hypothesis is false
12
A confidence interval should NOT contain the population parameter
False
True
