We obtained the confidence limits, and our 3 graphs, using these instructions:
> CL # lower conf. limit
> CU # upper conf. limit
> CU-CL # interval width
- These values of CL & CU were estimated by arithmetic linear interpolation.
- To obtain a similar (or better) result 'by eye', we could (instead) have entered the instruction locator(2) then pointed to where on each graph we thought the P-value intersected the alpha/2 and 1-alpha/2 lines.
- A simpler way to get a more accurate estimate is to use the using the code given above, but increase the number of parameter values tested from (R=) 1000 to 100000.