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Cards In This Set
| Front | Back |
 NULL HYPOTHESIS |
Start off with this. There is no chance, no difference between exposure and outcome eg. tobacco smoke and lung cancer.
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H0
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 Null Hypothesis |
 Alternative Hypothesis. Yes. There is a difference/association in the population |
H1
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I FAIL TO REJECT THE NULL HYPOTHESIS.
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 The H0 is true. |
 Yes, H1 is true. |
I REJECT THE NULL HYPOTHESIS
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P VALUERESULT OF CHANCE/PROBABILITY
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 Between 0 and 1 |
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UNLIKELY TO BE CHANCEEVIDENCE FOR THE ALTERNATIVE HYPOTHESIS H1 REJECT THE NULL / REAL DIFFERENCE
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 Small P's less than or equal to 0.05 or 5% |
 More than 0.05 or 5% |
YES IT WAS CHANCE. REJECT THE NULL (ACCEPT IT) AND CONCLUDE THERE IS NO EVIDENCE OF A REAL DIFFERENCE/ASSOCIATION IN THE POPULATION
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TYPE 1 ERROR
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 False positive -- A false alarm - Rejecting the null hypothesis when it is true |
 A Type II error |
FAIL TO REJECT THE NULL HYPOTHESIS WHEN YOU SHOULD HAVE (IT IS FALSE). HAVE A SUFFICIENT SAMPLE SIZE TO DETECT A DIFFERENT ASSOCIATION IF ONE EXISTS
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