Data from the U.S. Bureau of Labor Statistics show a steady decline in the avera

Question

Data from the U.S. Bureau of Labor Statistics show a steady decline in the average workweek of U.S. production workers from 38.5 hours in 1964 to 33.9 hours in 2006. But employees are spending time working when they are at home and behind the wheel. In a poll conducted for Staples, 49% of small-business managers in the United States reported that they make business calls or check e-mail while driving. [Source: Lisa Belkin, "Time Wasted? Perhaps It's Well spent," The New York Times, May 31, 2007.) Consider the experiment of randomly selecting four small-business managers and learning whether they make business calls or check e-mail while driving. Let C makes business calls or checks e-mail while driving, and N does not make business calls or check e-mail while driving The experiment satisfies the properties of a binomial experiment. The following tree diagram will help you visualize the sample space for this experiment.

Explanation / Answer

of the 16 outcomes total 4 turn out to be only one success

probabilty of that outcome =1/16=0.0625 as it is one out of 16 outcomes

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