The Average Time Between Phone Calls Arriving at a Call

question 15

Multiple Choice

The average time between phone calls arriving at a call center is 30 seconds.Assuming that the time between calls is exponentially distributed, find the probability that less than two minutes elapse between calls.

• A)0.018
• B)0.064
• C)0.936
• D)0.982
• E)1.000

---

Definitions:

Ex Post Facto

A research design in which the researchers retrospectively investigate the cause-and-effect relationship between variables, after the events have occurred.

Participant Groups

Divisions or categories of subjects who take part in a research study, often differentiated by certain variables or treatments.

Subject Variables

Characteristics of study participants that are not manipulated but can affect the outcome of an experiment, such as age, gender, intelligence, or personality.

Field Experiments

Research studies conducted in natural settings outside the laboratory to understand real-world behaviors and outcomes.