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)through(c)to the right.

Arrivals

0

21

1

41

2

43

3

37

4

24

5

18

6

10

7

5

8

1

Frequency

21

41

43

37

24

18

10

5

1

Compute the expected number of arrivals per minute.

mu = 2.635

b.Compute the standard deviation.

sigma= nothing(Typean integer or decimal rounded to three decimal places asneeded.)help please