PrepTest 11, Section 2, Question 15

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LSAT_Padawan
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Joined: Thu Feb 18, 2010 10:17 pm

PrepTest 11, Section 2, Question 15

Postby LSAT_Padawan » Wed Mar 10, 2010 2:01 am

This is the question about computer security with passwords are easily accessible by unauthorized users to steal or guess..."a new system that relies on recognizing the voices of authorized users apparently avoids this problem. In a small initial trial, the system never incorrectly accepted someone seeking access to the computer's data. Clearly, if this result can be repeated in an operational setting, then there will be a way of giving access to those people who are entitled to access and to no one else.

Why is it (D) ignores the possibility that the system sometimes denies access to people who are entitled to access?

If anything, I interpreted the question stim, "in a small initial trial, the system never incorrectly accepted someone seeking access to the computer's data" as it allowed anyone and everyone access to the computer data.

Your enlightenment is appreciated.

r6_philly
Posts: 10707
Joined: Sat Dec 19, 2009 4:32 pm

Re: PrepTest 11, Section 2, Question 15

Postby r6_philly » Wed Mar 10, 2010 2:26 am

I remember this question without reading it. Partially because it was actually a study subject for computer security. It deals with false positives and false negatives. When you program the system to be really strict with security authentication, it will likely to produce very few false positives, meaning people who are not supposed to have access are not given access. However when security is high, there usually is a rise in false negatives, meaning people who are supposed to have access are denied access (by not being positively identified).

So "never incorrectly accepted" != "correctly accepted everyone".
or
"0 person was incorrectly given access" could also at the same time mean "but 5 person was incorrectly NOT given access"

Hope this helps.




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