Dental Implants Statistics
I do a statistical test on my data but I do not know which test should i do? ?
ok I am planning to do a retrospective study dental implant failure in school and relate certain factors that could affect such as osteoporosis and smoking. this type of stat. i test should do? I have 5 groups, not drugs, smoking, osteoporosis, thyroid disease and cholesterol.
You want to start with a chi-square. The chi-square will help you determine if there is a difference between 2 of your 5 groups. You can not use an F-test because your data is boolean (failure or success). See this wiki for more info: http://en.wikipedia.org/wiki/Chi-square_test edit: you can not use an ANOVA or ANCOVA because your data is boolean – that is, 0 or 1. Your distribution under the null hypothesis is not a f-distribution. You're much better using a chi-square, which was custom made for problems like this.
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