Inferential Tests

Inferential Tests

1. univariate

   • one sample t test
     • determine if mean of sample is different from population mean
     • null hypothesis
       • there is no difference between means
     • table
       • one sample test
         • sig 2 tailed

2. bivariate

   • ANOVA
     • null hypothesis
       • mean of samples are equal on characteristic
     • table
       • ANOVA
         • sig < 0.05
           • reject null hypothesis
   • Chi square
     • nominal/ordinal
       • no assumption of population
         • tests for independence
           • relationship between variables
             • table
               • pearson chi square
                 • Sig 2 sided
                   • p < 0.05 null hypothesis rejected
                     • there is relationship
               • lambda/gamma for strength
     • null hypothesis
       • two variables are independent
   • independent t test
     • null hypothesis
       • there is no difference between sample means
     • table
       • independent samples test
         • sig < 0.05
           • equal variance not assumed
             • first row
               • sig 2 < 0.05
                 • reject null hypothesis