MathBench > Statistical Tests

Chi-square Tests

Play it again, Sam!

What if 90% of the sickdays were on M/F?

observed ("o") expected ("e") (o-e) (o-e)2 (o-e)2/e
Monday/ Friday
Midweek
Total 100 100    
Check

 

Ok, so now take that calculated chi square value and compare it to the critical chi square on the table.

chi-square table

 

You should have gotten a chi-square-calc of 104.166, compared to the chi-square-crit of 3.84. So, the chi-square-calc is much greater than the chi-square-crit -- so the data does not fit the model and you reject your null hypothesis. In other words, Dilbert's random sickday model does NOT hold up.