The manager of the commercial mortgage department of a large bank has collected data during the past two years concerning the number of commercial mortgages approved per week. The results from these two years (104 weeks) indicated the following:
Number of Commercial
Mortgages Approved Frequeny
0...............................................13
1...............................................25
2...............................................32
3...............................................17
4................................................9
5................................................6
6................................................1
7................................................1
a. Compute the expected number of mortgages approved per week.
b. Compute the standard deviation.