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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:

Arrivals..............Frequencies.........Probability

0.............................14.......................0.07

1.............................31......................0.155

2.............................47......................0.235

3.............................41......................0.205

4.............................29......................0.145

5.............................21......................0.105

6.............................10......................0.05

7..............................5.......................0.025

8..............................2.......................0.01

Totals.....................200.......................1

A. Compute the expected number of arrivals per minute.

B. Compute the standard deviation.

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##### Solution Summary

The solution assists with computing the expected number of arrivals per minute.

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