SOLUTION: Completion times for an assembly operation among a group of workers had a mean of 80 seconds and a standard deviation of 10 seconds. Can you count on a completion time of 100 secon

Question 1046049: Completion times for an assembly operation among a group of workers had a mean of 80 seconds and a standard deviation of 10 seconds. Can you count on a completion time of 100 seconds being on the extreme 10 percent of all completion times if the distribution of times is normal?
Answer by ewatrrr(24785) (Show Source): You can put this solution on YOUR website!

z = (100-80)/10 = 2
Top 10%: z = 1.2815
2 > 1.28156
Yes, can count on 100 seconds being on the extreme 10 percent of all completion times

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