(Solved): The number of visitors in the last 12 days reported the following: Obtain the 85th Percentile. Manu ...

The number of visitors in the last 12 days reported the following: Obtain the 85th Percentile. Manual: 28, Excel Inc: 28, Excel Exc: \( 28.25 \) Manual: 26.5, Excel Inc: 27.5, Excel Exc: \( 27.75 \) Manual: 27, Excel Inc: 27, Excel Exc: \( 27.25 \) Manual: 26, Excel Inc: 26.25, Excel Exc: \( 26.75 \) The average completion time for one piece is \( 7.1 \) minutes with a standard deviation of \( 1.2 \) minutes. If completion times follow a normal distribution, what percent of the pieces in a lot should be completed in less than or equal to \( 6.5 \) minutes? what percent of the pieces should be completed in \( 7.0 \) minutes or more? \[ \begin{array}{l} P(x \leq 6.5)=.293, P(x \geq 7.0)=0.669 \\ P(x \leq 6.5)=.309, P(x \geq 7.0)=0.467 \\ P(x \leq 6.5)=.309, P(x \geq 7.0)=0.533 \\ P(x \leq 6.5)=.293, P(x \geq 7.0)=331 \end{array} \]