Added missing display import to stat_test

stats/stat_test.py

@@ -8,7 +8,7 @@ from scipy.stats import ttest_ind
 from scipy.stats import ttest_rel
 from statsmodels.formula.api import ols
 from statsmodels.stats.multicomp import MultiComparison
-
+from IPython.display import display
 
 """
 Errors/Exceptions