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| you make a conclusion about a large population based on a small sample |
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1. State null hyopthesis
2. specify level of significance (p-value which usually equals 0.05)
3. If out statistic is significant at 0.05 we will reject the null-hypothesis and be correct in doing so 95% of the time
If your value is less than the critical it is not significant and you accept null
if your value is more than the critical it is significant and you reject null |
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| chi square = sum of (O-E)^2 / E |
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df = n-1
n = number of possible outcomes |
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