Chi-Squared 5.0 / 5 based on 1 rating ? Biologystatistical testingA2/A-levelAQA Created by: carysban99Created on: 07-10-16 09:30 What is a null hypothesis? There is no difference between the observed and the expected numbers 1 of 6 What are the rules when using the Chi-Squared? 1) sample must be 20+ 2) Needs to be discrete data 3) Only can use raw numbers 4) Compare to observed to expected 2 of 6 What is the formula? Sum of the (observed-expected)^2 / expected 3 of 6 If the value of chi-squared falls below 0.05% what do we do with the null hypothesis? It is rejected 4 of 6 What are degrees of freedom? Number of categories - 1 5 of 6 If chi-squared is above 0.05% what do we do with the null hypothesis? It is accepted 6 of 6
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