Solution Found!
In May 2005, Tony Blair was elected to an historic third
Chapter 3, Problem 175E(choose chapter or problem)
Problem 175E
In May 2005, Tony Blair was elected to an historic third term as the British prime minister. A Gallop U.K. poll (http://gallup.com/poll/content/default.aspx?ci=1710, June 28, 2005) conducted after Blair’s election indicated that only 32% of British adults would like to see their son or daughter grow up to become prime minister. If the same proportion of Americans would prefer that their son or daughter grow up to be president and 120 American adults are interviewed,
a what is the expected number of Americans who would prefer their child grow up to be president?
b what is the standard deviation of the number Y who would prefer that their child grow up to be president?
c is it likely that the number of Americans who prefer that their child grow up to be president exceeds 40?
Questions & Answers
QUESTION:
Problem 175E
In May 2005, Tony Blair was elected to an historic third term as the British prime minister. A Gallop U.K. poll (http://gallup.com/poll/content/default.aspx?ci=1710, June 28, 2005) conducted after Blair’s election indicated that only 32% of British adults would like to see their son or daughter grow up to become prime minister. If the same proportion of Americans would prefer that their son or daughter grow up to be president and 120 American adults are interviewed,
a what is the expected number of Americans who would prefer their child grow up to be president?
b what is the standard deviation of the number Y who would prefer that their child grow up to be president?
c is it likely that the number of Americans who prefer that their child grow up to be president exceeds 40?
ANSWER:
Solution:
Step 1 of 4:
Tony Blair was elected to an historic third term as the british.
In a poll 120 members were interviewed, in that 32% of British adults would like to see their son or daughter grow up to become prime minister.
Let X follows the Binomial distribution with probability mass function
P(x) = , x = 0, 1, 2, ....