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 20​% allowance for workers. ​(Round all intermediate calculations to two decimal places before proceeding with further​ calculations.)                                      Element  Performance Rating    1    2    3    4    5 Grasp and place bag    105    9    10    7    12    8 Fill bag    85    36    41    38    36    112 Seal bag    100    16    17    12    21    18 Place bag on conveyor    90    9    7    10    29 36         a) The standard time for this process​ = 82.94 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).

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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
20​% allowance for workers. ​(Round all intermediate calculations to two decimal places before proceeding with further​ calculations.)
                                     Element  Performance Rating    1    2    3    4    5
Grasp and place bag    105    9    10    7    12    8
Fill bag    85    36    41    38    36    112
Seal bag    100    16    17    12    21    18
Place bag on conveyor    90    9    7    10    29 36      
 
a) The standard time for this process​ = 82.94 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).           
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