The manager of the commercial mortgage department of a large bank has collected data during the past two years concerning the number of NumberApproved Frequency CI commercial mortgages approved per week. The results from these two years (104 weeks) are shown to the right. 0 12 a. Compute the expected number of mortgages approved per week. 1 25 b. Compute the standard deviation. 2 34 3 16 4 8 5 6 6 2 7 1 a. The expected number of mortgages approved per week is 2.135 . (Round to three decimal places as needed.) b. The standard deviation is . (Round to three decimal places as needed.)