contingency tables

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11 Terms

1
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What is the null hypotheses? (H0)

There is no association between… and…..

2
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What is the alternate hypotheses? (H1)

There is an association between… and…

3
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How do you calculate expected values in a contingency table?

(Row total x column total) ÷grand total

4
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How do you calculate the test statistic of a contingency table?

Sum of (obsevered value - expected value) ² ÷ expected value

5
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How do you calculate the degree of freedom? (v)

(Number of rows-1) x (number of colums-1)

6
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How do you calculate the significance level of 5%

Flip it - 5%=0.95 10%=0.9 etc

7
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What side of the number line do you shade on?

The right

8
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When do you reject H0?

When you are in the region

9
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What is the conclusion if you DO NOT REJECT H0

There is insufficient evidence to suggest that there is an association between…. And….

10
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What is the conclusion if you REJECT H0

There is significant evidence to suggest that there is an association between…. And…..

11
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