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.)

The Dubu Cement Company packs 80 pound bage of concrete mix. Time study data for the filling activity are shown in the following tablo. Because of the high physical workers. (Pound all intermediate calculation to me decimal places before proceeding with further calculations.) 1 8 36 16 7 Performance Observation (seconds) Element Rating 2 3 4 Grasp and place bag 115% 8 7 10 Fil bag 85% 42 40 36 Seal bag 106% 17 14 21 Place bag on conveyor 90% 7 10 29 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 = 87.28 seconds (round your response to two decimal places). b) The number of observations that are required for a 90% confidence level within 5% accuracy observations (round your response up to the next whole number) 9 Que ent Company packs 80-pound bags of concrete mix. Time-study data for the filling activ Because of the high physical demands of the job, the company's policy is a 23% allowa iate calculations to two decimal places before proceeding with further calculations.) X. Try again. The formula for finding the appropriate sample size is: Zs Required sample size =n= hx where h= accuracy level desired in percent of the job element, expressed as a decimal (5% = 0.05) z=number of standard deviations required for desired level of confidence (e.g. for 90% confidence, z - 1.65) s=standard deviation of the initial sample x=mean of the initial sample n=required sample size sbser spc OK answer in the nawet box and then click Cock Answer howing CA 11,358 P TY Chapters 10 and E