A) Standard time for this process is ___

B) How many observations are necessary for 99% confidence, within +-5% accuracy ______

The Dubuque Cement Company packs 80-pound bags of concrete mix. Time-study data for the lling activity are shown in the following table. Because of the high physical demands of the job, the company's policy is a 23% allowance for workers. (Round all intermediate calculations to two decimal places before proceeding with further calculations.) 5 Performance Observation (seconds) Element Rating 1 2 3 4 5 Grasp and place bag 115% 9 8 9 12 7 Fill bag 90 % 36 40 40 35 114 * Seal bag 105% 14 16 12 19 19 Place bag on conveyor 85 % 9 7 9 29 " 34 " * Bag breaks open; included as delay in the allowance factor " Conveyor jams; included as delay in the allowance factor a) The standard time for this process = I: seconds (round your response to two decimal places)