SOLUTION: A preliminary survey shows that 35% of college students smoke. In a class of 42 students, what is the probability that more than half the students smoke? Use Appendix B.1 for the z

Algebra ->  Probability-and-statistics -> SOLUTION: A preliminary survey shows that 35% of college students smoke. In a class of 42 students, what is the probability that more than half the students smoke? Use Appendix B.1 for the z      Log On


   

Question 1069931: A preliminary survey shows that 35% of college students smoke. In a class of 42 students, what is the probability that more than half the students smoke? Use Appendix B.1 for the z-values. (Round the z-value to 2 decimal places and the final answer to 4 decimal places.)
Answer by Edwin McCravy(20056) About Me  (Show Source):
You can put this solution on YOUR website!
On your TI-84 calculator, that's 1 minus
the cumulative probability that 21 or fewer
smoke.  Press these keys in this order after
clearing your calculator, assuming yours
is a later model TI-84

1
-
2ND 
VARS 
ALPHA 
APPS 
42
ENTER
.35
ENTER
21
ENTER
ENTER

0.0154905288   <-- answer

If yours is an older TI-84,

1
-
2ND
VARS
scroll to binomcdf(
ENTER

make screen read:

1-binomcdf(42,.3
5,21)

ENTER

Edwin