Recent years have also seen an increase in the use of HIM machines. When Mr. Selig took over the bank, the mean number of transactions per month per customer was 5; now he believes it has increased to more than i'. In fact, the advertising agency that prepares TV commercials for Century would like to use this on a new commercial being designed. Is dtere sufficient evidence to conclude dtat the mean number of transactions per customer is more than 5 per month? Could the advertising agency say the mean is more than 8 per month