a) The standard time for this process = ____ seconds (Please round to two decimal places)

b) The number of observations that are required for a 99 % confidence level within 5 % accuracy = _____ observations (round your response up to the next whole number).

c) The number of observations that are required for a 95% confidence level within 5% accuracy = _______ (Please round to two decimal places)=

The Dubuque Cement Company packs 80-pound bags of concrete mix. Time-study data for the filling 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.) Observation (seconds) 2 3 4 1 5 Element Grasp and place bag Fill bag Seal bag Place bag on conveyor Performance Rating 105% 80% 105% 90 % 12 34 7 37 14 8 8 39 14 6 112* 9 42 16 5 17 20 30^ 9 341 * Bag breaks open; included as delay in the allowance factor ^ Conveyor jams; included as delay in the allowance factor