Calculating Confidence Interval at a certain confidence level












0












$begingroup$


def get_ci(mean, cl, sd):
loc = stats.norm.ppf(1 - cl/2)
rng_val = stats.norm.cdf(loc - mean/sd)

lwr_bnd = value - rng_val
upr_bnd = value + rng_val

return_val = (lwr_bnd, upr_bnd)
return(return_val)


This function takes three parameters which are the following:



mean --> It is the mean
cl --> Confidence Level
sd --> Standard Deviation


Can someone explain how this function is working as for example if we are calculating 95% confidence interval, why can't we just return (-2*sd+mean,2*sd+mean)?










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$endgroup$

















    0












    $begingroup$


    def get_ci(mean, cl, sd):
    loc = stats.norm.ppf(1 - cl/2)
    rng_val = stats.norm.cdf(loc - mean/sd)

    lwr_bnd = value - rng_val
    upr_bnd = value + rng_val

    return_val = (lwr_bnd, upr_bnd)
    return(return_val)


    This function takes three parameters which are the following:



    mean --> It is the mean
    cl --> Confidence Level
    sd --> Standard Deviation


    Can someone explain how this function is working as for example if we are calculating 95% confidence interval, why can't we just return (-2*sd+mean,2*sd+mean)?










    share|improve this question







    New contributor




    Kartikeya Sharma is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
    Check out our Code of Conduct.







    $endgroup$















      0












      0








      0





      $begingroup$


      def get_ci(mean, cl, sd):
      loc = stats.norm.ppf(1 - cl/2)
      rng_val = stats.norm.cdf(loc - mean/sd)

      lwr_bnd = value - rng_val
      upr_bnd = value + rng_val

      return_val = (lwr_bnd, upr_bnd)
      return(return_val)


      This function takes three parameters which are the following:



      mean --> It is the mean
      cl --> Confidence Level
      sd --> Standard Deviation


      Can someone explain how this function is working as for example if we are calculating 95% confidence interval, why can't we just return (-2*sd+mean,2*sd+mean)?










      share|improve this question







      New contributor




      Kartikeya Sharma is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.







      $endgroup$




      def get_ci(mean, cl, sd):
      loc = stats.norm.ppf(1 - cl/2)
      rng_val = stats.norm.cdf(loc - mean/sd)

      lwr_bnd = value - rng_val
      upr_bnd = value + rng_val

      return_val = (lwr_bnd, upr_bnd)
      return(return_val)


      This function takes three parameters which are the following:



      mean --> It is the mean
      cl --> Confidence Level
      sd --> Standard Deviation


      Can someone explain how this function is working as for example if we are calculating 95% confidence interval, why can't we just return (-2*sd+mean,2*sd+mean)?







      python statistics






      share|improve this question







      New contributor




      Kartikeya Sharma is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.











      share|improve this question







      New contributor




      Kartikeya Sharma is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.









      share|improve this question




      share|improve this question






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      Kartikeya Sharma is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.









      asked 11 mins ago









      Kartikeya SharmaKartikeya Sharma

      1032




      1032




      New contributor




      Kartikeya Sharma is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.





      New contributor





      Kartikeya Sharma is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.






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      Check out our Code of Conduct.






















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