Question

Math help please

Answer 1

@Vocaloid

Answer 2

key word is false negative

so you'd want to calculate

(number of people who tested negatively AND have the disease)/ (total number of people who tested negatively)

Answer 3

@Vocaloid I added 172+4+120=296, then I divided it by 176, and got 1.68?

Answer 4

only 4 people tested negatively AND have the disease

Answer 5

so 4/172=0.023? or 4/176=0.0227

Answer 6

there are a total of 176 people who tested negatively, so 4/176

Answer 7

0.570; The probability of this error is high so the test is not very accurate.


0.0129; The probability of this error is low so the test is fairly accurate.


0.0323; The probability of this error is low so the test is fairly accurate.


0.0421; The probability of this error is low so the test is fairly accurate.

Answer 8

ah, actually hold on

Answer 9

they want the probability of selecting ***any*** random test, so it's 4/(all tests combined)