The owner of Touchdown Sports Bar wants to develop a time standard for the task of mixing a specialty cocktail. In a preliminary study, he observed one of his bartenders perform this task seven times with an average of 90 seconds and a standard deviation of 5 seconds.
What is the standard time for this task if the bartender worked at a 20 percent faster pace than is average, and an allowance of 10 percent of job time is used?
A)135 seconds
B)123.8 seconds
C)118.8 seconds
D)120 seconds
E)112.5 seconds

Question

Quizplus · Accepted Answer

First, calculate the average time at a 20% faster pace: 90 seconds / 1.2 = 75 seconds. Then, add a 10% allowance: 75 seconds * 1.1 = 82.5 seconds. The closest answer to 82.5 seconds is 118.8 seconds, which indicates a mistake in calculation or interpretation. The correct calculation should be: 90 seconds * 0.8 (to account for 20% faster pace) = 72 seconds. Then, adding a 10% allowance: 72 seconds * 1.1 = 79.2 seconds. None of the provided options match this correct calculation, suggesting a misunderstanding in the explanation process.

The Owner of Touchdown Sports Bar Wants to Develop a Time