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From |
Stas Kolenikov <skolenik@gmail.com> |

To |
statalist@hsphsun2.harvard.edu |

Subject |
Re: st: Mean and standard deviation of multiply-imputed values? |

Date |
Mon, 27 Sep 2010 12:41:51 -0500 |

On Sat, Sep 25, 2010 at 4:39 PM, Art Burke <Art.Burke@educationnorthwest.org> wrote: > If I have a multiply-imputed variable x1, I can get its mean and standard error from .... > > mi estimate: mean x1 > > Can I get the standard deviation also (without any hand calculation)? No, that's not what multiple imputation is expected to do; it only gives point estimates, i.e., means, proportions, regression coefficients. Nonlinear operations like sums of squares are outside of what's sensible with -mi-. Hence what you can do is to create the square of your x, register it, estimate its mean using -mi-, and then obtain the point estimate of the variance of x as E[x^2] - ( E[x] )^2. Still hand calculations though. -- Stas Kolenikov, also found at http://stas.kolenikov.name Small print: I use this email account for mailing lists only. * * For searches and help try: * http://www.stata.com/help.cgi?search * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/

**References**:**st: Mean and standard deviation of multiply-imputed values?***From:*Art Burke <Art.Burke@educationnorthwest.org>

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