The Average Number of Calls Received by a Switchboard in a 30-Minute

question 146

Essay

The average number of calls received by a switchboard in a 30-minute period is 15.
a.Define the random variable in words for this experiment.
b.What is the probability that between 10:00 and 10:30 the switchboard will receive exactly 10 calls?
c.What is the probability that between 10:00 and 10:30 the switchboard will receive more than 9 calls but fewer than 15 calls?
d.What is the probability that between 10:00 and 10:30 the switchboard will receive fewer than 7 calls?

---

Definitions:

Verbally

Through the use of words or speech.

Nonverbally

Communication through means other than spoken words, such as facial expressions, body language, gestures, and tone of voice.

Quiet Settings

Environments or circumstances characterized by minimal noise and disturbances, conducive to concentration, reflection, or relaxation.

Physical Illnesses

Disorders, diseases, or conditions that affect the physical body and can impact health, well-being, and productivity.