## pakinam 2 years ago In a population of 500 voters, 40% belong to Party X. A simple random sample of 60 voters is taken. What is the chance that a majority (more than 50%) of the sampled voters belong to Party X?

1. perl

this is a binomial problem n = 500 , p = .4 , we want probability more than 50% of 500 chose party X. so more than 250 So we want the cumulative probability of x = 251 , 252, 253, ... 499 , 500 Do you have a solution in your book?

2. perl

the speed of the canadian goose is 35 km / 45 minutes = (35/45) km / min the speed of the hummingbird is 35 km/ 60 minutes = (35/60) km / min ok so far? now lets change to km/hr

3. pakinam

ok

4. perl

wait I did this wrong

5. perl

this is a binomial problem n = 60, p = .4 , we want probability more than 50% of a sample of 60 chose party X. So we want probability of more than 30 So we want the cumulative probability of x = 31 , 32, 33, ...58,59,60

6. perl

So I got .044480

7. perl

on a TI 83 calculator you can solve 1 - binomcdf( 60, .4, 30) , that will give you probability there is more than 50% choosing party x in your sample

8. abhi_abhi

0.044480314 is correct ans??? @perl

9. KABRIC

no

10. abhi_abhi

@KABRIC plz explain method .. how to solve this problem. n what is the correct ans ??

11. KABRIC

i am looking forward to that too friend

12. abhi_abhi

@KABRIC if u got method n soln plz explain me .. how to solve and correct ans

13. KABRIC

ok will let you know if i solve this one right ok

14. KABRIC

anyone with a more simple approach at this problem plz

15. dinakar

any one got the ans

16. dinakar