A test to determine whether a certain antibody is present is 99.1% effective. This means that the test will accurately come back negative if the antibody is not present (in the test subject) 99.1% of the time. The probability of a test coming back positive when the antibody is not present (a false positive) is 0.009. Suppose the test is given to four randomly selected people who do not have the antibody. (a) What is the probability that the test comes back negative for all four people? (b) What is the probability that the test comes back positive for at least one of the four people? (a) Upper P (all 4 tests are negative )equals nothing (Round to four decimal places as needed.)

( a )   Probability that the test comes back negative for all four people = .9723

( b ) Probability that t he test comes back positive for at least one of the four people = .0277

Step-by-step explanation:

Given

The probability of  the test will accurately come back negative if the antibody is not present  =  99.1 = .991

The probability of  the test will accurately come back positive if the antibody is not present = .009

Suppose the test is given to four randomly selected people who do not have the antibody .

( a )   Probability that the test comes back negative for all four people =

      =   = .9723

If we say E = P( all 4 test are negative) or we say E = P( not of the all 4 test are positive)

P( at least one of the 4 test are positive) = 1 - P( not of the all 4 test are positive)  = 1 - P( all 4 test are negative)

( b ) Probability that t he test comes back positive for at least one of the four people =  1 - P( all 4 test are negative)

            = 1 - .9723

           =   .0277

idek

step-by-step explanation:

there has been genes found in the x chromosome of males that have been linked to [homo/hetero]sexuality. in addition to the reign of the x chromosome, a section of chromosome 8 has also been link to, "alot of ppl are so " these facts were proven true after a 2014 study of a gay male and his strait brother. according to newscientist.com,"chromosome 14 and is mainly active in the thyroid, but also the brain. called tshr, it makes a type of receptor protein that recognises and binds to a hormone that stimulates the thyroid. in this way, the gene plays an important role in controlling thyroid function. the fact that tshr seems to be involved in sexual orientation fits with evidence that thyroid function seems to be linked to sexuality."

in conclusion, "ppl are so gay" due to their genetics.