SOLUTION: A study is conducted to assess the impact of caffeine consumption, smoking, alcohol consumption, and physical activity on the risk of cardiovascular disease. Suppose that 40% of p

Algebra ->  Probability-and-statistics -> SOLUTION: A study is conducted to assess the impact of caffeine consumption, smoking, alcohol consumption, and physical activity on the risk of cardiovascular disease. Suppose that 40% of p      Log On


   

Question 363726: A study is conducted to assess the impact of caffeine consumption, smoking, alcohol consumption, and physical activity on the risk of cardiovascular disease. Suppose that 40% of participants consume caffeine and smoke. If 8 participants are evaluated, what is the probability that:
a. Exactly half of them consume caffeine and smoke?
b. At most 6 consume and smoke?
Answer by SadieKhan(31) About Me  (Show Source):
You can put this solution on YOUR website!
8 n
0.4 p

cumulative
X p(X) probability
0 0.01680 0.01680
1 0.08958 0.10638
2 0.20902 0.31539
3 0.27869 0.59409
4 0.23224 0.82633
5 0.12386 0.95019
6 0.04129 0.99148
7 0.00786 0.99934
8 0.00066 1.00000
1.00000
1) P(x= 4)= 0.23224
2)p(x<6) = 0.95019