Questions on Algebra: Probability and statistics answered by real tutors!

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Question 164405This question is from textbook Elementary Statistics
: If 10% of the people who are given a certain drug experience dizziness, find the probabilities for a sample of 15 people who take the drug.
A. At least two people become dizzy
b. Exactly three people become dizzy
c. At most four people become dizzy.This question is from textbook Elementary Statistics
: If 10% of the people who are given a certain drug experience dizziness, find the probabilities for a sample of 15 people who take the drug.
A. At least two people become dizzy
b. Exactly three people become dizzy
c. At most four people become dizzy.
Answer by themathprof(21) About Me  (Show Source):
You can put this solution on YOUR website!
Use the binomial distribution table with
p=.1, n=15
A at least 2 means x=2,3,4,5,6,...14, 15
or the opposite of x=0 and x=1
x=0 = .206, x=1=.343 together .206+.343=.549
now subtract from 1
1-.549=.451
B exactly 3. From the table: .129
C at most 4 mean x=0,1,2,3,4
from the table: .206+.343+.267+.129+.043=.988
All problems can also be solved with
the binomial experiment formula.
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