90% CI of the ratio of the within subject standard deviation [RSABE / ABEL]

posted by khaledazeid – 2016-12-31 11:10 (2665 d 21:30 ago) – Posting: # 16918
Views: 2,071

Dear All,
In the FDA guidance for RSABE for NTI drugs the 90% confidence interval of the ratio of the within subject standard deviation of test product to reference product is required to be less than or equal to 2.5. My question is:
  1. How can i calculate this 90% CI on SAS.
  2. is the F (the value of F distribution) given in the equation:
    [image]
    is the critical F value or else how it could be calculated.

Thanks in advance

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