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F-Distribution

A

Adam Ahmed

Member
Hi,

In one of the mark schemes of a past paper, the examiner uses the following result to derive the C.I using the F-distribution (see attached).

Couldn't we also obtain F(10,8,97.5%) from 1/(F(10,8,2.5%) i.e. 1/4.295?

Much appreciated,
A
 

Attachments

  • Fdist.png
    Fdist.png
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No, as 1/(F(10,8,2.5%) is the lower value for an F(8,10) distribution. Whereas you want both the tails of the F(10,8) distribution.
 
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