Chapter 18: S-Charts, 12<N<25

The average standard deviation for a process is 10, without more information the centerline of the chart cannot be established.

FALSE

The s Chart is used to monitor process means.

FALSE

The s-Chart can be used to plot either the range or standard deviation.

FALSE

The sample size is 14, and the average standard deviation is 1. The UCL is 2.594.

FALSE

The shortcut method uses the sample constant B(3) to calculate both the UCL and LCL.

FALSE

The most important chart to review when determining whether or not a process is in control is the s Chart not the X-Bar Chart.

TRUE

The s Chart uses the standard deviation to establish control limits.

TRUE

The sample size is 25, the average standard deviation is 5, the LCL is 2.825.

TRUE

When sample sizes are larger than twelve, the range is no longer used to determine the UCL and LCL.

TRUE

The sample size is 18, and the average standard deviation is 10. The UCL is 15.18.

True