The manager of the commercial mortgage department of a large bank has collected data during the past two years Number Approved Frequency 9; concerning the number of commercial mortgages approved per week. The results from these two years (104 weeks) 0 12 are shown to the right. 1 26 a. Compute the expected number of mortgages approved per week. 2 31 b. Compute the standard deviation. 3 16 4 9 5 7 6 2