1. Find the upper and lower control limits for x - and

R -charts for the width of a chair seat when the sample

grand mean (based on 30 samples of six observations

each) is 27.0 inches, and the average range is 0.35 inches.

2. Suppose that the sample grand mean (based on 25

samples of 10 observations each) for the weight of a

package of cereal is 10.1 ounces and the average range

is 0.4 ounces. Find the upper and lower control limits

for x - and R -charts.

Note: For rest of problems refer to Excel file that is attached

8. Compute control limits for x - and R -charts for the data

in the worksheet Problem 8. Construct and interpret the

charts.

9. Compute control limits for x - and R -charts for the data

in the worksheet Problem 9. Construct and interpret the

charts.

10. Hunter Nut Company produces cans of mixed nuts,

advertised as containing no more than 20% peanuts.

Hunter Nut Company wants to establish control limits

for their process to ensure meeting this requirement.

They have taken 30 samples of 144 cans of nuts from the production process at periodic intervals, inspected each

can, and identified the proportion of cans that did not

meet the peanut requirement (shown in the worksheet

Problem 10 ) . Compute the average proportion nonconforming and the upper and lower control limits for this process. Construct the p -chart and interpret the results.

Subject | General |

Due By (Pacific Time) | 04/03/2014 10:00 pm |

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