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What is a contingency table?
What do we call the data collected in the table?
How do we test for independence?
How do we calculate the expected values?
Create an expected values table for this observed value table:
The expected values don't need to be....
What is the formula to work out the test statistic?
Create a test statistic table from the tables above:
The greater the values in the (o - E)^2 / E cells correspond to the cells that have the greatest.....
What is Chi-squared distribution?
How is Chi-squared denoted?
The number of independent random variables is called....
For the contingency table m x n , how do we calculate the degrees of freedom?
the test statistic calculated from a contingency table is approximately χ^2 distribution:
Chi-squared test for association between category A and category B :
For any Chi-squared test, what are our null and alternative hypothesis' ?
What are our conclusions for Chi-squared distribution?
If the expected value in any cell is too small, it increases chance of.....
We should not run a χ^2 test for association if any cell has an expected value of less than or equal to....
How could we attempt to fix the problem above?
Chi-squared table:
(Use only 0.9 and above)
