Question: - 10.30 Installing mufflers at the Stanley Garage in Golden, Colorado, involves five work elements. Linda Stanley has timed workers performing these tasks seven times,

- 10.30 Installing mufflers at the Stanley Garage in Golden, Colorado, involves five work elements. Linda Stanley has timed workers performing these tasks seven times, with the results shown in the following table. "Employee has lengihy conversations with boss (not job related). By agreement with her workers, Stanley allows a 10% fatigue factor, a 10% personal-time factor but no time for delay. To compute standard time for the work operation, Stanley excludes all observations that appear to be unusual or nonrecurring. She does not want an error of more than 5%. a) What is the standard time for the task? b) How many observations are needed to assure a 95% confidence level

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