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Chi-Squared Test on a table of Binomial Variates - Finding the expected frequencies

  1. Apr 16, 2012 #1
    Hi,

    Carry out a chi-squared test for the following table of frequencies of X ∼ Binomial(5,p) variates when (a) p = 0.3

    x 0 1 2 3 4 5
    Observed 162 346 303 149 36 4
    frequency

    Now I know how to carry out the chi-squared test once I have found the expected frequencies but the answers states that the frequencies are,

    x 0 1 2 3 4 5
    Exp(p = 0.3) 168.1 360.2 308.7 132.3 28.4 2.4

    What formula did they use to calculate these frequencies?

    Thanks
     
  2. jcsd
  3. Apr 17, 2012 #2

    Stephen Tashi

    User Avatar
    Science Advisor

    Re: Chi-Squared Test on a table of Binomial Variates - Finding the expected frequenci

    Are you asking for why "expected frequency" is treated the same as "probability"? I haven't checked the table. Is it a table for the binomial probability distribution?
     
  4. Apr 25, 2012 #3
    Re: Chi-Squared Test on a table of Binomial Variates - Finding the expected frequenci

    Hi,

    I'm asking how the figured out these expected frequencies..
     
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