small tweaks
small tweaks

STAT-ATA-ASU/STT3851Spring2016,STAT-ATA-ASU/STT3851Spring2016,STAT-ATA-ASU/STT3851ClassRepo,STAT-ATA-ASU/STT3851ClassRepo,STAT-ATA-ASU/STT3851Spring2016,STAT-ATA-ASU/STT3851ClassRepo