iSixSigma

Estimation of sample size

Six Sigma – iSixSigma › Forums › Old Forums › General › Estimation of sample size

Viewing 7 posts - 1 through 7 (of 7 total)
  • Author
    Posts
  • February 11, 2004 at 10:15 am #34539

    Mohandas
    ★ 10 Years ★
    Participant

    How do we estimate the sample size for a given confidence level and standard deviation of proportions in case of a  finite population ?

    0
    February 11, 2004 at 2:50 pm #95308

    eric
    ★ 10 Years ★
    Participant

    Sample Size = Conf Level ^2 X(Proportion)(1-Proportion)/(0.5)^2
    Prediction Error is assumed to be 0.5
     

    0
    February 11, 2004 at 3:39 pm #95310

    Cone
    ★ 10 Years ★
    Participant

    It is actually the z value associated with the confidence level squared multiplied by (p*q)/(prediction error)^2, where q=(1-p)

    0
    February 24, 2004 at 10:31 am #95988

    Mohandas
    ★ 10 Years ★
    Participant

    hi eric
    sorry 4 gettin back so late. but would like to know if u have some proof or some more info on the formula  given  by u
    tks
    deepa
     
     

    0
    February 24, 2004 at 5:28 pm #96003

    PA
    ★ 20 Years ★
    Participant

    Deepa
    See the discussion on this forum  as minimum sample size . This may help you

    0
    February 25, 2004 at 6:16 am #96024

    Pai
    ★ 10 Years ★
    Participant

    Can one presume that the prediction error refers to the consumer’s risk (Beta) in choosing the sample size and that the producer’s risk (alpha) is given by 1- Confidence Level ?
     
    TIA
    Rajesh

    0
    February 25, 2004 at 12:32 pm #96028

    Rajanga Sivakumar
    ★ 20 Years ★
    Participant

    Deepa,
    You may try:
    https://www.isixsigma.com/offsite.asp?A=Fr&Url=http://www.surveyguy.com/SGcalc.htm
    Rajanga

    0
  • Author
    Posts
Viewing 7 posts - 1 through 7 (of 7 total)

The forum ‘General’ is closed to new topics and replies.