On your TI-84

Press 2ND VARS ALPHA APPS

You'll see this:

          binomcdf
trials:
p:
x value:
Paste

Make that screen read:

          binomcdf
trials:30
p:.04
x value:3
Paste

Scroll down to Paste
Press ENTER 

You'll see this:

binomcdf(30,.04,
3)

Press ENTER again

You'll see

     .9694071153

That's the answer.  

[Note: If you have an old version of TI-84, you have to
make it read:  binomcdf(30,.04,3)  then press ENTER]



Edwin

 

Hi,

a study indicates that 4% of american teenagers have tattoos. 

if you randomly sample 30 teenagers  

what is the probability at most 3 teenagers will have tattoos?

bionomial Probability distribution: P = nCx , p = .04, q = .96  and n = 30 

P (x ≤ 3) = P(x=0)+ P(x=1)+  P(x=2) +  P(x=3) = .9694 

RELATED QUESTIONS

A recent Wall Street Journal article indicated that 38% of American teenagers use... (answered by Boreal)

A recent Wall Street Journal article indicated that 38% of American teenagers use... (answered by mathmate)

In Geotown there are 210 teenagers that own a tablet. This is at least 4/5 of all... (answered by josmiceli)

Let X be the number from 5 randomly selected teenagers who have sent text messages on... (answered by ewatrrr)

can someone please help me solve this? thank you so much.

An insurance company is... (answered by stanbon)

can someone please help me solve this? thank you so much.

An insurance company is... (answered by stanbon)

A recent Wall Street Journal article indicated that 49% of American teenagers use... (answered by Lightning_Fast)

In a certain city, 48% of all teenagers own a cellphone and 39% of all teenagers own a... (answered by stanbon)

In California, 50% of all teenagers own a skateboard and 40% of all teenagers own a... (answered by stanbon)