It worked! Output workspace and stats are defined elsewhere. So the new script is shown as this instead:
for file in arcpy.ListFiles("*.txt"):
loss_table = os.path.join(output_workspace, str(file[:-4]))
summary = (str(loss_table + "summ"))
arcpy.TableToGeodatabase_conversion(file, output_workspace)
arcpy.Statistics_analysis(loss_table, summary, stats, "CensusBlock")
Thanks so much for the tip!