chi square frequency calculation what statistic should you use to check whether there is a difference between age groups when to use statistic chi square how is chi square measured how many age groups are used to predict prognosis what statistic should we use to compare age groups what is the correct statistic to use to test prognosis in six categories and how many age groups how are age groups classified how to compare frequency of 6 age groups what statistic should be used to determine age group why do we use chi square instead of chi square test why is chi square used in statistics how do you determine prognosis in squint what test statistic should use to compare age groups what statistic should I use to measure the frequency of squint what statistic should i use to test for chi square when to use chi square or chi square test statistic what statistic should be used for a comparison of age group chi square statistics can you show a pattern for chi squared statistics how many categories of age group do you have to be classified for squint