What type of graphs are used to display continuous data for several groups?
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side-by-side boxplots
Post-hoc tests are formulated so that the overall type 1 error after all comparisons is
___?
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Post-hoc tests are formulated so that the overall type 1 error after all
comparisons is 0.05
,What is the test statistic (T)?
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- the discrepancy between the data and what is expected under the null
hypothesis
test statistic = (observed - expected) / precision
confounding definition
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when another variable is associated with the outcome and comparison
groups differ with respect to this variable
the total area under the curve equals ...... or ........
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1, or 100%
Expected cell counts >=5, observations are independent
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, Assumptions of the chi-square test of independence
alpha levels
significants levels.
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other names for P values
When to report the confidence interval in a report?
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- always report CI if p <0.05
- optional if p >0.05
What is a common plot to use as a measure of agreement?
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, - Bland-Altman plot
- the difference between scores tells us about agreement (disagreement)
- a wider range on the vertical axis means more disagreement
what does a p-value of 0.01-0.05 mean?
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some evidence against null hypothesis
Which of the following scientific hypotheses could I test using an ANOVA?
1) H0: the proportion of people with an activity score over 100 did not change
between the baseline measurement and 12 month follow-up
H1: the proportion of people with an activity score over 100 changed between the
baseline measurement and 12 month follow-up
______________________________________________________________________________________________________
2) H0: there was no change in the mean activity score between the baseline
measurement and the 12 month follow-up
H1: there was a change in the mean activity score between the baseline measurement
and the 12 month follow-up
______________________________________________________________________________________________________
3) H0: the mean activity score is the same for the control group, the intervention A
group and the intervention B group
H1: at least one of the mean activity scores is different between the groups
______________________________________________________________________________________________________
4) H0: the mean activity score is 200
H1: the mean activity score is different to 200
Give this one a try later!
side-by-side boxplots
Post-hoc tests are formulated so that the overall type 1 error after all comparisons is
___?
Give this one a try later!
Post-hoc tests are formulated so that the overall type 1 error after all
comparisons is 0.05
,What is the test statistic (T)?
Give this one a try later!
- the discrepancy between the data and what is expected under the null
hypothesis
test statistic = (observed - expected) / precision
confounding definition
Give this one a try later!
when another variable is associated with the outcome and comparison
groups differ with respect to this variable
the total area under the curve equals ...... or ........
Give this one a try later!
1, or 100%
Expected cell counts >=5, observations are independent
Give this one a try later!
, Assumptions of the chi-square test of independence
alpha levels
significants levels.
Give this one a try later!
other names for P values
When to report the confidence interval in a report?
Give this one a try later!
- always report CI if p <0.05
- optional if p >0.05
What is a common plot to use as a measure of agreement?
Give this one a try later!
, - Bland-Altman plot
- the difference between scores tells us about agreement (disagreement)
- a wider range on the vertical axis means more disagreement
what does a p-value of 0.01-0.05 mean?
Give this one a try later!
some evidence against null hypothesis
Which of the following scientific hypotheses could I test using an ANOVA?
1) H0: the proportion of people with an activity score over 100 did not change
between the baseline measurement and 12 month follow-up
H1: the proportion of people with an activity score over 100 changed between the
baseline measurement and 12 month follow-up
______________________________________________________________________________________________________
2) H0: there was no change in the mean activity score between the baseline
measurement and the 12 month follow-up
H1: there was a change in the mean activity score between the baseline measurement
and the 12 month follow-up
______________________________________________________________________________________________________
3) H0: the mean activity score is the same for the control group, the intervention A
group and the intervention B group
H1: at least one of the mean activity scores is different between the groups
______________________________________________________________________________________________________
4) H0: the mean activity score is 200
H1: the mean activity score is different to 200
