A worker was observed for four cycles of a repetitive operation.The observed times for work elements are 11,10,8,and 11 seconds,respectively.What sample size is appropriate for estimating the time for this work element within + 3 percent of the true mean time with 95 percent confidence (z = 1.96)?
A)fewer than or equal to 70
B)greater than 70 but fewer than or equal to 75
C)greater than 75 but fewer than or equal to 80
D)greater than 80

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The Answer of A worker was observed for four cycles of a repetitive operation.The observed times for work elements are 11,10,8,and 11 seconds,respectively.What sample size is appropriate for estimating the time for this work element within + 3 percent of the true mean time with 95 percent confidence (z = 1.96)?
A)fewer than or equal to 70
B)greater than 70 but fewer than or equal to 75
C)greater than 75 but fewer than or equal to 80
D)greater than 80

A Worker Was Observed for Four Cycles of a Repetitive