A Laboratory Worker Finds That 1

Multiple Choice

A laboratory worker finds that 1.8% of his blood samples test positive for the HIV virus.If 270 blood samples are selected at random,is it appropriate to use a normal model to approximate the distribution of the number that test positive for the HIV virus?

A) Yes;normal model with μ = 4.86 and σ = 4.77 can be used to approximate the distribution
B) No;normal model cannot be used to approximate the distribution because nq < 10
C) Yes;normal model with μ = 4.86 and σ = 2.18 can be used to approximate the distribution
D) No;normal model cannot be used to approximate the distribution because np < 10
E) Yes;normal model with μ = 265.14 and σ = 2.18 can be used to approximate the distribution