• The number of arrivals per minute at a bank located in the central business district of a large city was recorded over a period of 200minutes, with the results shown in the table below. Complete(a) and(b).
• A) Compute the expected number of arrivals per minute?
• B) Compute the standard deviation?

Arrivals

Frequency

0

18

1

37

2

46

3

38

4

25

5

19

6

11

7

5

8

1