Suppose the Time Intervals Between Arrivals of Successive Cars at an Expressway

question 101

Multiple Choice

Suppose the time intervals between arrivals of successive cars at an expressway tollbooth during rush hour are exponentially distributed and that the average time interval between arrivals is 8 seconds. Find the probability that the average time interval between arrivals of successive cars is more than 17 seconds. Round your answer to two decimal places.

• A) 0.12
• B) 0.64
• C) 0.62
• D) 0.23

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Definitions:

Source Credibility

The level of trustworthiness, reliability, and expertise attributed to a source of information by its audience.

Expertise

How much a source knows.

Trustworthiness

Whether a source will honestly tell you what he or she knows.

Halo Effect

The assumption that because people have one desirable trait (e.g., attractiveness), they also possess many other desirable traits (e.g., intelligence).