Contents
Can Chi-Square be used for 3 groups?
First, when you perform Chi-square test for the three groups together, you will get general idea about the differences between groups. Then you can perform the sub-effect test between only the group that had significantly higher prevalence with the other groups.
Are proportions categorical?
Data concerning one categorical variable can be summarized using a proportion. The symbol for a sample proportion is and is read as “p-hat.” The symbol for a population proportion is .
What type of data is proportions?
With ordinal data, you can calculate the same things as nominal data like frequencies, proportions, percentage, central point but there is one more point added in ordinal data that is summary statistics and similarly bayesian statistics.
Is there a test to compare more than 2 proportions?
75+ 1 7 3 0 0 0 0 0 0 0… To compare k ( > 2) proportions there is a test based on the normal approximation. It consists of the calculation of a weighted sum of squared deviations between the observed proportions in each group and the overall proportion for all groups.
How do you compare k ( > 2 ) proportions?
To compare k ( > 2) proportions there is a test based on the normal approximation. It consists of the calculation of a weighted sum of squared deviations between the observed proportions in each group and the overall proportion for all groups. The test statistic has an approximate c 2 distribution with k −1 degrees of freedom.
How to compare more than 2 proportions without continuity correction?
To total the numbers of cases, and total numbers of observations for each age group, we use the tapply command: After this it is easy to perform the test: 6-sample test for equality of proportions without continuity correction H 0: The proportion of cases is the same in each age group: p 1 = p 2 = p 3 = p 4 = p 5 = p 6
Which is the proportion of cases not the same in each age group?
H 0: The proportion of cases is the same in each age group: p 1 = p 2 = p 3 = p 4 = p 5 = p 6 H a: The proportion of cases is not the same in each age group: at least one p i is different from the others