Posts Tagged ‘ multiple imputation ’

Example 9.33: Multiple imputation, rounding, and bias

May 29, 2012
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Example 9.33: Multiple imputation, rounding, and bias

Nick has a paper in the American Statistician warning about bias in multiple imputation arising from rounding data imputed under a normal assumption. One example where you might run afoul of this is if the data are truly dichotomous or count variables...
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Example 9.6: Model comparison plots (Completed)

September 21, 2011
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Example 9.6: Model comparison plots (Completed)

We often work in settings where the data set has a lot of missing data-- some missingness in the (many) covariates, some in the main exposure of interest, and still more in the outcome. (Nick describes this as "job security for statisticians").Some ana...
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Example 9.6: Model comparison plots (Completed)

September 21, 2011
By
Example 9.6: Model comparison plots (Completed)

We often work in settings where the data set has a lot of missing data-- some missingness in the (many) covariates, some in the main exposure of interest, and still more in the outcome. (Nick describes this as "job security for statisticians").Some ana...
Read more »

Tags: , , , , ,
Posted in SAS | Comments Off on Example 9.6: Model comparison plots (Completed)

Example 9.6: Model comparison plots (Completed)

September 21, 2011
By
Example 9.6: Model comparison plots (Completed)

We often work in settings where the data set has a lot of missing data-- some missingness in the (many) covariates, some in the main exposure of interest, and still more in the outcome. (Nick describes this as "job security for statisticians").Some ana...
Read more »

Tags: , , , , ,
Posted in SAS | Comments Off on Example 9.6: Model comparison plots (Completed)

Example 9.4: New stuff in SAS 9.3– MI FCS

September 6, 2011
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Example 9.4: New stuff in SAS 9.3– MI FCS

We begin the new academic year with a series of entries exploring new capabilities of SAS 9.3, and some functionality we haven't previously written about.We'll begin with multiple imputation. Here, SAS has previously been limited to multivariate norma...
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Example 9.4: New stuff in SAS 9.3– MI FCS

September 6, 2011
By
Example 9.4: New stuff in SAS 9.3– MI FCS

We begin the new academic year with a series of entries exploring new capabilities of SAS 9.3, and some functionality we haven't previously written about.We'll begin with multiple imputation. Here, SAS has previously been limited to multivariate norma...
Read more »

Tags: , ,
Posted in SAS | Comments Off on Example 9.4: New stuff in SAS 9.3– MI FCS

Example 9.4: New stuff in SAS 9.3– MI FCS

September 6, 2011
By
Example 9.4: New stuff in SAS 9.3– MI FCS

We begin the new academic year with a series of entries exploring new capabilities of SAS 9.3, and some functionality we haven't previously written about.We'll begin with multiple imputation. Here, SAS has previously been limited to multivariate norma...
Read more »

Tags: , ,
Posted in SAS | Comments Off on Example 9.4: New stuff in SAS 9.3– MI FCS

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