incomplete data analysis

Dear R users,

First of all, thank you for your help about goodness of fit tests.

I have another set of data and i am sure it is incomplete. I searched for
incomplete data analysis with R but I could not find any suggestion, or
method. Lets say (totally hypothetical situation) from a distribution you
can generate a continuous random sample between the numbers 0 and 100. but
I
have data from 20 to 80 and the rest is missing. I suspect this data comes
from the distribution I mentioned. If I use tests like ks.test or
chi-square
to test if the data comes from this distribution it says NO because it
takes
my sample as whole sample.

If there is any suggestion about the package I have to read, or function I
have to use or I can modify, I would be very glad.

Thank you in advance.

PS:I would like to prevent any misunderstanding, I am not asking for a
code.
Maybe, I could not find the right words to search and I would appreciate
any
help (name of the package or search key words or even if it is possible or
not...)

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