Introduction to biostatistics: Part 4, statistical inference techniques in hypothesis testing

摘要: Statistical methods used to test the null hypothesis are termed tests of significance. Selection an appropriate significance is dependent on type data be analyzed and number groups compared. Parametric based parameters, mean, standard deviation, variance, thus appropriately when interval or ratio analyzed. The t -test analysis variance (ANOVA) examples parametric Assumptions regarding using ANOVA include normality populations from which sample drawn, homogeneity variances independence points within a group. use if there only two compare. If three more compare, test. holds preset α level constant. While will imply significant difference between compared, multiple comparison define differ significantly.