Question
According to an information technology advisoryfirm, 30 % of mobile phones worldwide use a certain operating system in 2013. A random sample of 29 mobile
According to an information technology advisoryfirm, 30% of mobile phones worldwide use a certain operating system in 2013. A random sample of 29
mobile phone users was selected in 2013. Use the normal approximation to the binomial distribution to answer parts a through e below
a. Calculate the mean and standard deviation for this distribution
b. What is the probability that 11 or more of the 29 mobile phone users have this operatingsystem?
c. What is the probability that exactly 12 of the 29 mobile phone users have this operatingsystem?
d. What is the probability that 5, 6, or 7 of the 29 mobile phone users have this operatingsystem?
e. What is the probability that 12, 13, or 14 of the 29 mobile phone users have this operatingsystem?
Step by Step Solution
There are 3 Steps involved in it
Step: 1
Get Instant Access to Expert-Tailored Solutions
See step-by-step solutions with expert insights and AI powered tools for academic success
Step: 2
Step: 3
Ace Your Homework with AI
Get the answers you need in no time with our AI-driven, step-by-step assistance
Get Started