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26 Cards in this Set
- Front
- Back
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Mean |
Average |
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Median |
Middle |
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Mode |
Frequent |
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Mean |
Continuous data |
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Median |
Skewed data. If kean and median are same it is not skewed |
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Range |
Highest number minus lowest number |
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Normal distribution |
Bell shaped curve middle line is mean and median symmetric no skew or mirror image |
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Standard deviation |
Variation from mean smaller deviation, similar effect on most patients. |
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Skewed dar |
Use meduan |
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Null hypothesis |
No difference if there is a difference null hypothesis fail to be accepted. |
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Alternative hypothesis |
There is a difference. |
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P value |
Probability or chance. P value is less than significance or alpha level. All about statistical significance not the clinical significance. |
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Confidence interval |
Range of values probability of containing true value or point estimate. P value plus ci is 100% |
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Difference contains 0 |
Not statistical significance |
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Rr contains 1 |
Not significant |
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Positive correlation |
Both variables going in same direction up or down |
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Type 1 error |
False positive |
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Type 2 error |
False negative |
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Rrr equal to |
1 minus rr |
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Nnt number needed to test |
1 divided by are (decimal) |
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Odds |
Probability of event occurring compared to probability that it will not occur |
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Risk |
Probability of event occurring with all possibilities for it to occur |
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Odds ratio |
Ratio of odds of event in treatment to control |
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Hazard ratio |
Unfavorable event in given point in time |
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Arr equals to |
% risk in control - % risk in treatment group. |
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Bp age etc. |
Continuous data |
