Binominal procedural help needed

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Binominal procedural help needed
Message posted by Bob Evans (via 208.246.235.227) on December 20, 2001 at 8:31 PM (ET)

If you test "X" parts and "Y" pass, what level of statistical confidence do you have that at least 50% of the lot would pass? I need to know how to do this calculation generally. I don't know exactly to address this. Could someone walk me through the procedure. I realize that it is a binominal distribution with a 0.50 chance for every piece selected. I just don't know how to get to the answer.
Thanks in advance.

READERS RESPOND:
(In chronological order. Most recent at the bottom.)

Re: Binominal procedural help needed
Message posted by JG (via 128.8.23.6) on December 21, 2001 at 1:51 AM (ET)

You need sample size, etc.

Re: Binominal procedural help needed
Message posted by Bob Evans (via 208.246.235.227) on December 21, 2001 at 9:30 AM (ET)

OK, n=sample size. The percent defective in the lot is not known. Its a binomial problem, but its more than looking up a value. Can anyone help walk through the steps???
Bob

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