How Many Cycles Should Be Used in a Time Study

question 24

Multiple Choice

How many cycles should be used in a time study in order to be 98% confident that the time-study average job cycle time is within 4% of the true average job cycle time? Assume that the average job cycle time is 4.25 minutes and the standard deviation of the sample is 0.65 minutes.

• A)55 cycles
• B)70 cycles
• C)80 cycles
• D)95 cycles

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Definitions:

Otoscope

A medical device used for examining the ear's interior to diagnose ear conditions and infections.

Myringoscope

An instrument used for examining the eardrum or tympanic membrane.

Otosclerosis

A condition in which abnormal bone growth around the stapes bone leads to hearing loss.

Labyrinthitis

An inner ear disorder that causes inflammation of the labyrinth, leading to vertigo and hearing loss.