Take a simple operation that you perform regularly, such as brushing your teeth,

shaving, or combing your hair, and estimate the time it takes you to perform that

operation. Now measure the time it takes while working at a standard pace. Is your

estimate within plus or minus $20$ percent of the estimated time?

To demonstrate various levels of performance to a group of union stewards, the

time study supervisor of XYZ Company is using the metronome while dealing

bridge hands. How many times per minute should the metronome beat to

demonstrate the following levels of performance? $60$ percent, $75$ percent, $100$

percent, $125$ percent

You used the General Electric guide sheet to determine the number of observations

to study. The guide sheet indicated that $10$ cycles were required. After making the

study, you used the standard error of the mean to estimate the number of

observations needed for a given confidence level. The resulting calculation

indicated that $20$ cycles should be studied. What would be your procedure? Why?