Answer the given problem below related to work study and measurement. (Show required solutions.)

1. Installing mufflers in a garage involves five work elements. An IE times the workers performing these tasks seven times with the results shown below: cycle observations (mins) A 10\% fatigue factor and a 10% personal-time factor is given for an 8-hour shift. The time study analyst does not want an error of more than 5%. (la) What are the normal times for each of the element? (lb) What is the standard time for the task? 2. The following data represent observations for a task in an assembly process. How many observations would be necessary for the observer to be 99% confident that the average task time is within 5% of the true value? 3. A time study at the phone company has observed a job containing three elements. The times and ratings for 10 cycles are shown in the table: (3a) Find the average observed time for each element. (3b) Find the normal time for each element. (3c) Assuming an allowance factor of 20% of job time, determine the standard time for this job