+EOF
+
+cat > 24-moments.expr <<'EOF'
+cfvar(1, 2, 3, 4, 5) => 0.53
+cfvar(1, $sysmis, 2, 3, $sysmis, 4, 5) => 0.53
+cfvar(1, 2) => 0.47
+cfvar(1) => error
+cfvar(1, $sysmis) => sysmis
+cfvar(1, 2, 3, $sysmis) => 0.50
+cfvar.4(1, 2, 3, $sysmis) => sysmis
+cfvar.4(1, 2, 3) => error
+cfvar('x') => error
+cfvar('x', 1, 2, 3) => error
+
+mean(1, 2, 3, 4, 5) => 3.00
+mean(1, $sysmis, 2, 3, $sysmis, 4, 5) => 3.00
+mean(1, 2) => 1.50
+mean() => error
+mean(1) => 1.00
+mean(1, $sysmis) => 1.00
+mean(1, 2, 3, $sysmis) => 2.00
+mean.4(1, 2, 3, $sysmis) => sysmis
+mean.4(1, 2, 3) => error