information concerning the allocation of loan portfolios to different market sectors is given below. allocation of loan portfolios in different sectors (%) sectors national bank a bank b commercial 30% 50% 10% consumer 40 30 40 real estate 30 20 50 bank a and bank b would like to estimate how much their portfolios deviate from the national average. which bank is further away from the national average? is a large standard deviation necessarily bad for an fi using this model?