topic Re: Nonparametric tolerance interval by sas in SAS Procedures

Nonparametric tolerance interval by sas

happytrial2020 — Thu, 13 Feb 2020 18:19:57 GMT

Hi,

I have a question about the non-parametric tolerance interval for variables. I follow the procedure below and want to find out the non-parametric tolerance interval for data:

proc capability data=New noprint;
intervals result_mL / methods = 3 7;
run;

I choose the method 3 and 7(Non-parametric). However, the error shows that "

The value specified for METHOD must be an integer greater than or equal to 1 and less than or equal to 6.".

Could someone tell me why it happens and how to fix?

Thanks!

Re: Nonparametric tolerance interval by sas

ballardw — Thu, 13 Feb 2020 23:20:24 GMT

The documentation from https://documentation.sas.com/?cdcId=qccdc&cdcVersion=14.3&docsetId=qcug&docsetTarget=qcug_capability_sect209.htm&locale=en#qcug.capability.int_opt_methods

shows only options 1 through 6

METHOD=indices

specifies which intervals are computed. The indices can range from 1 to 6, and they correspond to the intervals described in Table 6.50.

Table 6.50: Intervals Computed for METHOD=Index

Index

Statistical Interval

1

approximate simultaneous prediction interval for k future observations

2

prediction interval for the mean of k future observations

3

statistical tolerance interval that contains at least proportion p of the population

4

confidence interval for the population mean

5

prediction interval for the standard deviation of k future observations

6

confidence interval for the population standard deviation

For example, the following statements tabulate confidence limits for the population mean (METHOD=4) and confidence limits for the population standard deviation (METHOD=6):
proc capability data=steel;
   intervals width / methods=4 6;
run;

Index	Statistical Interval
1	approximate simultaneous prediction interval for k future observations
2	prediction interval for the mean of k future observations
3	statistical tolerance interval that contains at least proportion p of the population
4	confidence interval for the population mean
5	prediction interval for the standard deviation of k future observations
6	confidence interval for the population standard deviation

Re: Nonparametric tolerance interval by sas

happytrial2020 — Fri, 14 Feb 2020 00:07:57 GMT

Thanks so much for replying. I just happen to see a document that they do have method 7.

The example is here: https://documentation.sas.com/?docsetId=qcug&docsetTarget=qcug_capability_sect222.htm&docsetVersion=15.1&locale=en

The explanation also shows here: https://documentation.sas.com/?docsetId=qcug&docsetTarget=qcug_capability_sect208.htm&docsetVersion=15.1&locale=en

But I noticed it should be realized by using SAS/QC.

So do you have any idea about how we can make the nonparametric tolerance interval by just using regular SAS version?

Thanks so much!

Re: Nonparametric tolerance interval by sas

ballardw — Fri, 14 Feb 2020 16:09:52 GMT

@happytrial2020 wrote:

H,

Thanks so much for replying. I just happen to see a document that they do have method 7.

The example is here: https://documentation.sas.com/?docsetId=qcug&docsetTarget=qcug_capability_sect222.htm&docsetVersion=15.1&locale=en

The explanation also shows here: https://documentation.sas.com/?docsetId=qcug&docsetTarget=qcug_capability_sect208.htm&docsetVersion=15.1&locale=en

But I noticed it should be realized by using SAS/QC.

So do you have any idea about how we can make the nonparametric tolerance interval by just using regular SAS version?

Thanks so much!

The question becomes which version of SAS are you running? It appears that you have an earlier version than SAS/Qc 15.

Re: Nonparametric tolerance interval by sas

happytrial2020 — Fri, 14 Feb 2020 16:35:28 GMT

Yes. I am finding my version is expired so that does not work. Thanks for helping!

Appreciate it!