For Element B$,$ Observation $5$ is $41$ seconds per cycle and the performance rating is $110\%$

For Element C$,$ Observation $1$ is $39$ seconds per cycle and the performance rating is $85\%$

For Element C$,$ Observation $2$ is $41$ seconds per cycle and the performance rating is $85\%$

For Element C$,$ Observation $3$ is $40$ seconds per cycle and the performance rating is $85\%$

For Element C$,$ Observation $4$ is $42$ seconds per cycle and the performance rating is $85\%$

For Element C$,$ Observation $5$ is $41$ seconds per cycle and the performance rating is $85\%$

Using the data and an allowance of $10$ percent of task time, determine a standard tie for the task.

Determine the number of observations that would be required to estimate the mean time for element A within $4$ percent of the true value with a confidence of $98$ percent.

How many observations would be needed to estimate the mean time for Element C to within $0\mathrm{.}01$ minutes of its actual value with a confidence of $90$ percent?