Scenario 4.3
A job consists of three elements.Twenty observations for each element were timed,and the resulting data are shown in the following table.A performance rating has also been assigned for each element,as shown in the table.The job has an allowance of 15% of normal time.

-Use the information in Scenario 4.3.What is the normal time for job element #2?
A)greater than or equal to 3 minutes
B)less than 3 minutes but greater than or equal to 2.6 minutes
C)less than 2.6 minutes but greater than or equal to 2.2 minutes
D)less than 2.2 minutes

Question

Scenario 4.3
A job consists of three elements.Twenty observations for each element were timed,and the resulting data are shown in the following table.A performance rating has also been assigned for each element,as shown in the table.The job has an allowance of 15% of normal time.
 
-Use the information in Scenario 4.3.What is the normal time for job element #2?
A)greater than or equal to 3 minutes 
B)less than 3 minutes but greater than or equal to 2.6 minutes 
C)less than 2.6 minutes but greater than or equal to 2.2 minutes 
D)less than 2.2 minutes

Quizplus · Accepted Answer

To find the normal time for job element #2, we must first calculate the average time for each element by adding up the observed times and dividing by 20.

For job element #2, the total observed time is 51.1 minutes. Dividing by 20, we get an average observed time of 2.555 minutes.

Next, we must adjust for the 15% allowance, which means we need to divide the average observed time by 0.85.

2.555 ÷ 0.85 = 3.006

So the normal time for job element #2 is less than 3 minutes but greater than or equal to 2.6 minutes, which corresponds to answer choice B.

Scenario 4.3 A Job Consists of Three Elements.Twenty Observations for Each Element