Results 1 to 4 of 4

Math Help - help

  1. #1
    Newbie
    Joined
    Nov 2008
    Posts
    12

    help

    3. (15 points / 3 points each) Wait time for a taxi outside Penn Station in New York City is uniformly distributed on the interval (0, 420) where the random variable X is given in seconds.

    a. Classify this problem by type using the letter choices:
    A. binomial probability problem, C. normal probability problem about a single X,
    B. uniform probability problem, D. normal probability problem about a
    E. none of the above.


    b. What is the probability that you wait more than 3 minutes?


    c. What is the probability that you wait less than 2 minutes?


    d. What is your expected wait time?


    e. 30% of the time you can expect to wait longer than how many seconds for a taxi?


    Follow Math Help Forum on Facebook and Google+

  2. #2
    Flow Master
    mr fantastic's Avatar
    Joined
    Dec 2007
    From
    Zeitgeist
    Posts
    16,948
    Thanks
    5
    Quote Originally Posted by stewardt View Post
    3. (15 points / 3 points each) Wait time for a taxi outside Penn Station in New York City is uniformly distributed on the interval (0, 420) where the random variable X is given in seconds.

    a. Classify this problem by type using the letter choices:
    A. binomial probability problem, C. normal probability problem about a single X,
    B. uniform probability problem, D. normal probability problem about a
    E. none of the above.

    Mr F says: B!!!


    b. What is the probability that you wait more than 3 minutes?


    c. What is the probability that you wait less than 2 minutes?


    d. What is your expected wait time?


    e. 30% of the time you can expect to wait longer than how many seconds for a taxi?

    The others are just application of the rules and theorems. Where are you stuck?
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Newbie
    Joined
    Nov 2008
    Posts
    12
    Quote Originally Posted by mr fantastic View Post
    The others are just application of the rules and theorems. Where are you stuck?
    a)B
    b).5714
    c).2857
    d)3.5
    e)2.1

    These are the answers I got for 3
    Follow Math Help Forum on Facebook and Google+

  4. #4
    Flow Master
    mr fantastic's Avatar
    Joined
    Dec 2007
    From
    Zeitgeist
    Posts
    16,948
    Thanks
    5
    Quote Originally Posted by stewardt View Post
    a)B
    b).5714
    c).2857
    d)3.5 Mr F says: Give the unit!
    e)2.1 Mr F says: The question requires an answer in seconds, not minutes .....

    These are the answers I got for 3
    b) and c) probably should be expressed as exact fractions ....
    Follow Math Help Forum on Facebook and Google+


/mathhelpforum @mathhelpforum