The CFDC says 1 in 88 kids are affected by BSD or A. A school says out of 300 stdnts , 7 are documented as having BSD.

Question

Why can you consider this a binomial experiment?

 

In a school this size, how many students would we expect to have BSD?

Answer 1

Hi Liz,

 

We consider this as a Binomial experiment as It is a Discrete random variable.

1 in 88 kids are affected by BSD or A.

 in School there are 300 students so

300/88= approx 3 students are affected by BSD or A

Total number of students are 300.

n(total no of students)= 300........eq-1

n(students affected by BSD or A)= 3.....eq-2

n(students are documented as BSD by school)=7..........eq-3

n(students)=n(students having BSD)+n(A)-n(BSD or A)

300=7+n(A)-3

300-4=n(A)=296

so 

In a school 300 students, according to above explaination,

 we would expect 4 students to have only BSD.

 

Meena from Strongsville,OH.