Technology and the Internet
In February 2013, the Chinese Ministry of Industry and Information Technology announced plans to expand broadband connections (or faster) to 70% of Chinese households. Suppose the plan is successful and 40 Chinese households are selected at random.
a. What is the probability that exactly 25 households have broadband coverage?
b. What is the probability that at most 30 households have broadband coverage?
c. What is the probability that more than 33 households have broadband coverage?
d. Suppose the number of households that have broadband coverage is within two standard deviations of the mean. What is the probability that the actual number that have broadband coverage is within one standard deviation of the mean?