Working with missing values
Caveat: Replacing missing values is not something to be done lightly. David C Howell has a good page on the Treatment of Missing Data
- Missing values and DO IF
- Conditionally replacing missing by mean
- Replace missing by random value taken from cases with valid value
- Replace missing with mean
- Replace missing by median values within each case
- Replace missing by mean of category
- Replace "Blanks" by value from preceding case
- Recode certain dates as missing
- Mean substitution in additive scale
- List variable names with missing values and identify main elements of cases
- Hot Deck
- Identifying the3 types of missing values
- Conditionally replacing missing by mean example 2
- Delete variables that have only missing values
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