Results 1 to 2 of 2

Math Help - I could use some help with this problem?

  1. #1
    Newbie
    Joined
    Apr 2006
    Posts
    8

    I could use some help with this problem?

    In a certain state 60% of the voters are democrats. Randomly select a sample of 300 voters.

    A. Describe the sampling distribution of the sample proportion.

    B. what is the smallest required size of sample for the distribution of the sample proportion to be approximately normal?

    C. what is the probability that 190 or less voters are democrats?

    D. what is the probability that 150 or more voters are democrats?

    E. What is the probability that the number of democrats is between 140 and 230?
    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 maxmac97 View Post
    In a certain state 60% of the voters are democrats. Randomly select a sample of 300 voters.

    A. Describe the sampling distribution of the sample proportion.

    B. what is the smallest required size of sample for the distribution of the sample proportion to be approximately normal?

    C. what is the probability that 190 or less voters are democrats?

    D. what is the probability that 150 or more voters are democrats?

    E. What is the probability that the number of democrats is between 140 and 230?
    Read this, it has all you need to know: Sampling Distribution
    Follow Math Help Forum on Facebook and Google+

Search Tags


/mathhelpforum @mathhelpforum