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The lifetime risk of developing lung
cancer is about 1.25%.
What is the probability of that you ask ten
people before one says he or she has lung
cancer
NADEEM UDDIN
ASSOCIATE PROFESSOR
OF STATISTICS
/NADEEMUDDIN17
HTTPS://NADEEMSTATS.WORDPRESS.COM/LISTOFBOOKS/
Example
The lifetime risk of developing lung cancer is about 1.25%.
(a) What is the probability of that you ask ten people before one
says he or she has lung cancer?
(b) Find the (i) mean and (ii) standard deviation.
Solution:
(a) P = 0.0125
q = 1- 0.01 = 0.9875
x=10
  =  = モ1
  = 10 = (0.0125)(0.9875)101
  = 10 = 0.0112
(b)
 =
1

 =
1
0.0125
= 80
.  =

2
.  =
0.9875
(0.0125)2 = 79.50

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The lifetime risk of developing lung cancer is about 1.25%.

  • 1. The lifetime risk of developing lung cancer is about 1.25%. What is the probability of that you ask ten people before one says he or she has lung cancer NADEEM UDDIN ASSOCIATE PROFESSOR OF STATISTICS /NADEEMUDDIN17 HTTPS://NADEEMSTATS.WORDPRESS.COM/LISTOFBOOKS/
  • 2. Example The lifetime risk of developing lung cancer is about 1.25%. (a) What is the probability of that you ask ten people before one says he or she has lung cancer? (b) Find the (i) mean and (ii) standard deviation. Solution: (a) P = 0.0125 q = 1- 0.01 = 0.9875 x=10 = = モ1 = 10 = (0.0125)(0.9875)101 = 10 = 0.0112
  • 3. (b) = 1 = 1 0.0125 = 80 . = 2 . = 0.9875 (0.0125)2 = 79.50