The tread life of a particular brand of tire is a random variable best described by a normal distribution with a mean of 60,000 miles and a standard deviation of 1800 miles. What is the probability a particular tire of this brand will last longer than 58,200 miles?

Which of the following is not one of the forces in Porter's model of an organization's competitive environment?

A. the power of suppliers B. the impact of new competitors entering the market C. the influence of the labor force D. the impact of substitute or complement services or products E. the competition among existing rivals in the industry

Telemarketing has proven to be useful in performing all of the following activities EXCEPT:

A. Prospecting B. Providing technical assistance C. Negotiation D. Repeat purchases E. Speeding up marketing communications