Final answer:
SMS (Short Message Service) is the common term for sending short text messages from cell phones, and a user typically sends or receives 1.73 messages per hour on average.
Step-by-step explanation:
The common term for sending short text messages from cell phones is SMS (Short Message Service). It allows users to send brief text-based messages between mobile devices. With evolving communication habits, texting has become a popular way to stay in contact with friends and family, notably surpassing traditional phone calls in convenience and discretion. When it comes to the sheer volume of messages, a text message user receives or sends an average of 41.5 text messages per day, which averages out to approximately 1.73 messages per hour, assuming that texting occurs consistently over a 24-hour period.
To calculate the probability of a text message user receiving or sending two messages in an hour, we would need to know the distribution of messages sent per hour, which typically follows a Poisson distribution in real-world scenarios. Furthermore, for a user to receive or send more than two messages per hour, one would again need to refer to the specific message distribution curve for that user's messaging habits.