The data in the table below represent time study observations for a woodworking

Question

The data in the table below represent time study observations for a woodworking operation. (Hint See Soved Problems section) ating 110% 1.20 1.17 1.16 1.22 1.24 1.15 0.83 .87 0.78 .82 e.85 1.32 0.58 e.53 .52 .590.60 .54 105 Unusual delay, disregard time. o. Based on the observations, determine the standard time for the operation, assuming an allowance of 15 percent of job time. (Roung your intermediate calculations and final answers to 3 decimel places.) tandard time b. How many observations would be needed to estimate the mean time for element 2 within 1 percent of its true value with a 95 5 percent confidence? (Round your intermediate colculations to 3 decimal places and round up your final answer to the next whole number.) Number of observations Prey 2 of 10 Next>

Explanation / Answer

By calculating the standard time using the formula:

Standard time= Normal time divided by(1+ allowance time)

Element 1: Standard time: 1.505+-0.005

Element 2. standard time: 1.098 +- 0.005

Element 3. Standard time: 0.676+-0.005

number of observations that needs to be done for estimating mean time for element 2 is 68+-1

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