A Methods and Measurements Analyst needs to develop a time standard for a certain task. In a preliminary study, he observed one of his employees perform this task five times, with the following results:

OBSERVATION	1	2	3	4	5
TIME (SECONDS)	84	76	80	84	76

How many observations should be made if the analyst wants to be 99.74 percent confident that the maximum error in the observed time is two seconds? Assume that the standard deviation of task times is 4 seconds.

Multiple Choice

• 5

• 6

• 25

• 36

A Methods and Measurement Analyst wants to develop a time standard for a certain task. In a preliminary study, he observed one employee perform the task six times with an average of 20 seconds and a standard deviation of 2 seconds. What is the normal time (NT) for this task if the employee worked at a twenty percent faster pace than is average?

Multiple Choice

• 4 seconds

• 16.7 seconds

• 20 seconds

• 24 seconds

• 100 seconds

A Methods and Measurement Analyst wants to develop a time standard for a certain task. In a preliminary study, he observed one employee perform the task six times with an average of 20 seconds and a standard deviation of 2 seconds. How many observations should be made if he wants to be 95.44 percent confident that the maximum error in the observed time is one second?

Multiple Choice

• 3

• 4

• 13.3

• 16

A Methods and Measurements Analyst for Timepiece, Inc. needs to develop a time standard for the task of attaching a watch to a wristband. In a preliminary study, he observed one of his employees perform this task five times, with the following results:

OBSERVATION	1	2	3	4	5
TIME (SECONDS)	27	19	20	21	13

What is the standard time (ST) for this task if the employee worked at a twenty percent faster pace than the average, and an allowance of twenty percent of the workday is used?

Multiple Choice

• 20 seconds

• 24 seconds

• 25 seconds

• 28.8 seconds

• 30 seconds