Write-up of Results

Descriptive Statistics                                            
                                       N           Mean        SD    
Single                              5              8.0        1.58
Twin                                5              8.0        2.51
Triplet                             5              8.0        1.87   

Analysis of Variance of Sociability Data                               
Source                                 SS              df             MS              F            
Between Groups                 41.200             2          20.600        5.02*
Within Groups                   49.200           12            4.100                 
*p <.05

The groups differed significantly in Sociability (F(2,12) = 5.02; p < .05). A post-hoc test (Tukey HSD) revealed that only the mean difference between the Sociability scores for single children and triplets was significant (p < .05).