Results 1 to 2 of 2

Math Help - six sigma

  1. #1
    Newbie
    Joined
    Apr 2006
    Posts
    4

    six sigma

    I need help to solve a question on 6 sigma.

    Ex: A magazine publishing company set a standard that subscription applications be processed within three days of receipt. If, out of a sample of 1000 applications, 50 fail to meet this requirement, at what sigma level is this process operating?
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Grand Panjandrum
    Joined
    Nov 2005
    From
    someplace
    Posts
    14,972
    Thanks
    4
    Quote Originally Posted by avinash View Post
    I need help to solve a question on 6 sigma.

    Ex: A magazine publishing company set a standard that subscription applications be processed within three days of receipt. If, out of a sample of 1000 applications, 50 fail to meet this requirement, at what sigma level is this process operating?
    50/1000 = 0.05

    So the subscription process fails to meet the three day requirement in 5%
    of cases. Now we do an inverse table look up on the standard normal table to see what z score cuts of 5% of the distribution on the top end, that is we
    find z0 such that:

    p(z>z0)=0.05.

    doing this we find that z0=1.645 which is the sigma level that the process
    is operating at.

    RonL
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Replies: 1
    Last Post: February 4th 2011, 08:39 AM
  2. Show intersection of sigma-algebras is again a sigma-algebra
    Posted in the Advanced Statistics Forum
    Replies: 1
    Last Post: November 20th 2010, 07:21 AM
  3. how to determine sigma and sgn(sigma) for matrices
    Posted in the Advanced Algebra Forum
    Replies: 2
    Last Post: May 16th 2010, 11:12 AM
  4. N(mui,sigma^2)
    Posted in the Advanced Statistics Forum
    Replies: 2
    Last Post: April 20th 2010, 06:07 AM
  5. sigma
    Posted in the Advanced Math Topics Forum
    Replies: 5
    Last Post: February 6th 2010, 08:05 PM

Search Tags


/mathhelpforum @mathhelpforum