Computing One-Sided Lower Prediction Limits

INTERVALS Statement

Computing One-Sided Lower Prediction Limits

See CAPINT1 in the SAS/QC Sample Library

You can specify options after the slash (/) in the INTERVALS statement to control the computation and printing of intervals. The following statements produce a table of one-sided lower prediction limits for the mean, which is displayed in Figure 6.3:

   title 'Statistical Intervals for Fluid Weight';
   proc capability data=cans noprint;
      intervals weight / methods = 1 2
                         type    = lower;
   run;

The METHODS= option specifies which intervals to compute, and the TYPE= option requests one-sided lower limits. All the options available in the INTERVALS statement are listed in "Summary of Options" and are described in "Dictionary of Options".

Statistical Intervals for Fluid Weight

The CAPABILITY Procedure

One-Sided Lower Statistical Intervals for weight Assuming Normality

Approximate Prediction Limit For All of k Future Observations
Confidence	k	Lower Limit
99.00%	1	11.90
99.00%	2	11.89
99.00%	3	11.88
95.00%	1	11.93
95.00%	2	11.92
95.00%	3	11.91
90.00%	1	11.95
90.00%	2	11.93
90.00%	3	11.92

Approximate Prediction Limit For the Mean of k Future Observations
Confidence	k	Lower Limit
99.00%	1	11.90
99.00%	2	11.93
99.00%	3	11.94
95.00%	1	11.93
95.00%	2	11.95
95.00%	3	11.96
90.00%	1	11.95
90.00%	2	11.97
90.00%	3	11.97

Figure 6.3: One-Sided Lower Prediction Limits for the Mean

Chapter Contents
Previous
Next
Top