In testing a new drug, researchers found that 5% of all patients using it will h
ID: 3207065 • Letter: I
Question
In testing a new drug, researchers found that 5% of all patients using it will have a mild side effect. A random sample of 7 patients using the drug is selected. Find the probability that:
A) None will have this mild side effect.
B) At least one will have this mild side effect.
a) A) 0.0500, B) 0.9500
b) A) 0.6983, B) 0.0500
c) A) 0.6983, B) 0.3017
d) A) 0.9500, B) 0.0500
e) A) 0.9500, B) 0.3017
f) None of the above
In testing a new drug, researchers found that 7% of all patients using it will have a mild side effect. A random sample of 13 patients using the drug is selected. Find the probability that exactly two will have this mild side effect.
a) 0.1820
b) 0.1720
c) 0.2220
d) 0.2020
e) 0.2120
f) None of the above
Explanation / Answer
This all example of binomial distribution P(x)=ncx P^x(1-p)^n-x
1. p=0.05 and n=7
A. P(x=0)=0.6983
B. P(x>=1)=0.3017 so c is answer
2. n=13 and P=0.07
So P(x=2)=0.1720 so b is ans
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