wokr on docs

diff --git a/doc/statistics.texi b/doc/statistics.texi
index 351842e94e24b285995c3e5acdbba683bdfc35f9..82855902f29c530d9257b8af3aa4ee2f8211f6c5 100644 (file)
--- a/doc/statistics.texi
+++ b/doc/statistics.texi
@@ -1121,7 +1121,7 @@ When @pspp{} reads data from a file in an external format, such as a
 text file, variables' measurement levels are often unknown.  If
 @code{CTABLES} runs when a variable has an unknown measurement level,
 it makes an initial pass through the data to guess measurement levels
-using the rules described earlier in this manual (@pxref{Measurement
+using the rules described in an earlier section (@pxref{Measurement
 Level}).  Use the @code{VARIABLE LEVEL} command to set or change a
 variable's measurement level (@pxref{VARIABLE LEVEL}).
 
@@ -1293,12 +1293,17 @@ Options}), or user-missing values excluded because
 @code{MISSING=EXCLUDE} is in effect on @code{CATEGORIES}, or
 system-missing values.  @code{COUNT} does not count these.
 
+@xref{CTABLES Missing Values for Summary Variables}, for details of
+how @code{CTABLES} summarizes missing values.
+
 @item @code{VALIDN} (``Valid N'', F40.0)
 The sum of valid count weights in included categories.
 
-@code{VALIDN} does not count missing values regardless of whether they
-are in included categories via @code{CATEGORIES}.  @code{VALIDN} does
-not count valid values that are in excluded categories.
+For categorical variables, @code{VALIDN} does not count missing values
+regardless of whether they are in included categories via
+@code{CATEGORIES}.  @code{VALIDN} does not count valid values that are
+in excluded categories.  @xref{CTABLES Missing Values for Summary
+Variables}, for details.
 
 @item @code{VARIANCE} (``Variance'')
 The variance.
@@ -1375,10 +1380,11 @@ Percentage of the sum of the values within @var{area}.
 @node CTABLES Summary Functions for Adjusted Weights
 @subsubsection Summary Functions for Adjusted Weights
 
-If the @code{WEIGHT} subcommand specified an adjustment weight
-variable, then the following summary functions use its value instead
-of the dictionary weight variable.  Otherwise, they are equivalent to
-the summary function without the @samp{E}-prefix:
+If the @code{WEIGHT} subcommand specified an effective weight variable
+(@pxref{CTABLES Effective Weight}), then the following summary functions
+use its value instead of the dictionary weight variable.  Otherwise,
+they are equivalent to the summary function without the
+@samp{E}-prefix:
 
 @itemize @bullet
 @item
@@ -1421,7 +1427,7 @@ counts:
 @code{UMISSING} (``Unweighted Missing'')
 
 @item
-@code{UMODE} (``Unweight Mode'')
+@code{UMODE} (``Unweighted Mode'')
 
 @item
 @code{U@i{area}PCT.SUM} (``Unweighted @i{Area} Sum %'', PCT40.1)
@@ -2067,8 +2073,8 @@ By default, or with @code{HIDESOURCECATS=NO}, categories referred to
 by computed categories are displayed like other categories.  Use
 @code{HIDESOURCECATS=YES} to hide them.
 
-@node CTABLES Base Weight
-@subsection Base Weight
+@node CTABLES Effective Weight
+@subsection Effective Weight
 
 @display
 @t{/WEIGHT VARIABLE=}@i{variable}
@@ -2076,17 +2082,17 @@ by computed categories are displayed like other categories.  Use
 
 The @code{WEIGHT} subcommand is optional and must appear before
 @code{TABLE}.  If it appears, it must name a numeric variable, known
-as the @dfn{effective base weight} or @dfn{adjustment weight}.  The
-effective base weight variable stands in for the dictionary's weight
+as the @dfn{effective weight} or @dfn{adjustment weight}.  The
+effective weight variable stands in for the dictionary's weight
 variable (@pxref{WEIGHT}), if any, in most calculations in
 @code{CTABLES}.  The only exceptions are the @code{COUNT},
 @code{TOTALN}, and @code{VALIDN} summary functions, which use the
 dictionary weight instead.
 
 Weights obtained from the @pspp{} dictionary are rounded to the
-nearest integer at the case level.  Effective base weights are not
-rounded.  Regardless of the weighting source, @pspp{} does not analyze
-cases with zero, missing, or negative effective weights.
+nearest integer at the case level.  Effective weights are not rounded.
+Regardless of the weighting source, @pspp{} does not analyze cases
+with zero, missing, or negative effective weights.
 
 @node CTABLES Hiding Small Counts
 @subsection Hiding Small Counts