5.5 The number of arrivals per minute at a bank located in the central business district of a large city was recorded ov

[answerhappygod]

5.5 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 200 minutes, with the following results:
A table depicts the frequency of arrivals.
arrivals frequency
0 14
1 31
2 47
3 41
4 29
5 21
6 10
7 5
8 2
Calculate the expected number of arrivals per
minute.
Calculate the standard deviation.
What is the probability that there will be
fewer than 2 arrivals in a given minute?