Question

Quick Algebra 2 help please






The probabilities of a test are represented by I for infected; U, uninfected; D, infection detected; and N, no infection detected. What is the symbolic way to represent the probability of a true positive?

Answer 1

This is basic probability, you really should just read something off google or whatever.

Answer 2

You can look at set intersection as the chance that 2 things happen.

Answer 3

I really am pretty clueless with this stuff, I'd really appreciate an answer this time just so I could have something to work off of. My guess based off reading some notes would be C

Answer 4

I see how names used for tests might confuse you, it has nothing to do with mathematics.

If you have a test for say HIV, you would call a result a false positive if the test detects HIV but the patient is not actually infected.

Someone can have HIV and the tests come back negative, that would be undetected.

If you have HIV and test positive, that's a true positive.

No test is foolproof.

Answer 5

Alright thank you, after looking your post over, is the answer D?

Answer 6

if you have a coin and want to find the probability of flipping heads or tails you would have P(H U T)

Answer 7

so the answer would be D? That is really all I am getting here. I do not understand this topic that well.

Answer 8

No the answer is not D, what course are you taking? I wouldn't call this algebra 2 although I don't know how much the curriculum has changed.

Answer 9

I'm taking Algebra 2

Answer 10

Do you know about set intersection and union?

Say {1,2,3} U { 4,5} is equivalent to {1,2,3,4,5}

Anyhow, that U stands for OR, The upside down one is for intersection, it represents AND.

Answer 11

you're looking for probability of infected AND detected

Answer 12

if I am looking for both, I would guess the answer would be B then

Answer 13

what does the numerator mean in b?