diff --git a/applications/lazstats/data/ancova.laz b/applications/lazstats/data/ancova.laz
new file mode 100644
index 000000000..f298fbe73
--- /dev/null
+++ b/applications/lazstats/data/ancova.laz
@@ -0,0 +1,235 @@
+40
+4
+Group
+VARIABLE 1
+1
+I
+0
+99999
+L
+Y
+VARIABLE 2
+5
+F
+3
+99999
+L
+X
+VARIABLE 3
+5
+F
+3
+99999
+L
+Z
+VARIABLE 4
+5
+F
+3
+99999
+L
+Case 0
+Group
+Y
+X
+Z
+Case 1
+1
+12.00
+5.00
+10.00
+Case 2
+1
+15.00
+5.00
+10.00
+Case 3
+1
+14.00
+6.00
+9.00
+Case 4
+1
+14.00
+7.00
+13.00
+Case 5
+1
+18.00
+7.00
+15.00
+Case 6
+1
+18.00
+8.00
+17.00
+Case 7
+1
+16.00
+8.00
+17.00
+Case 8
+1
+14.00
+9.00
+15.00
+Case 9
+1
+18.00
+9.00
+14.00
+Case 10
+1
+19.00
+10.00
+18.00
+Case 11
+2
+13.00
+4.00
+10.00
+Case 12
+2
+16.00
+4.00
+10.00
+Case 13
+2
+15.00
+5.00
+15.00
+Case 14
+2
+16.00
+6.00
+12.00
+Case 15
+2
+19.00
+6.00
+16.00
+Case 16
+2
+17.00
+8.00
+16.00
+Case 17
+2
+19.00
+8.00
+18.00
+Case 18
+2
+23.00
+9.00
+15.00
+Case 19
+2
+19.00
+10.00
+19.00
+Case 20
+2
+22.00
+10.00
+18.00
+Case 21
+3
+14.00
+4.00
+8.00
+Case 22
+3
+16.00
+4.00
+14.00
+Case 23
+3
+18.00
+6.00
+11.00
+Case 24
+3
+20.00
+6.00
+11.00
+Case 25
+3
+18.00
+7.00
+16.00
+Case 26
+3
+19.00
+8.00
+20.00
+Case 27
+3
+22.00
+8.00
+19.00
+Case 28
+3
+21.00
+9.00
+19.00
+Case 29
+3
+23.00
+10.00
+12.00
+Case 30
+3
+20.00
+10.00
+16.00
+Case 31
+4
+15.00
+4.00
+16.00
+Case 32
+4
+16.00
+5.00
+10.00
+Case 33
+4
+13.00
+5.00
+13.00
+Case 34
+4
+15.00
+6.00
+7.00
+Case 35
+4
+19.00
+6.00
+15.00
+Case 36
+4
+17.00
+7.00
+20.00
+Case 37
+4
+20.00
+7.00
+16.00
+Case 38
+4
+18.00
+9.00
+21.00
+Case 39
+4
+20.00
+9.00
+15.00
+Case 40
+4
+21.00
+11.00
+21.00
diff --git a/applications/lazstats/data/ancova3.laz b/applications/lazstats/data/ancova3.laz
new file mode 100644
index 000000000..c9aba8f0c
--- /dev/null
+++ b/applications/lazstats/data/ancova3.laz
@@ -0,0 +1,555 @@
+72
+6
+Row
+VARIABLE 1
+1
+I
+0
+99999
+L
+Col
+VARIABLE 2
+1
+I
+0
+99999
+L
+Slice
+VARIABLE 3
+1
+I
+0
+99999
+L
+X
+VARIABLE 4
+4
+F
+2
+99999
+L
+Cov1
+VARIABLE 5
+4
+F
+2
+99999
+L
+Cov2
+VARIABLE 6
+4
+F
+2
+99999
+L
+Case 0
+Row
+Col
+Slice
+X
+Cov1
+Cov2
+Case 1
+1
+1
+1
+1.00
+3.00
+1.00
+Case 2
+1
+1
+1
+2.00
+1.00
+3.00
+Case 3
+1
+1
+1
+3.00
+4.00
+3.00
+Case 4
+1
+1
+2
+2.00
+6.00
+1.00
+Case 5
+1
+1
+2
+3.00
+5.00
+5.00
+Case 6
+1
+1
+2
+4.00
+3.00
+4.00
+Case 7
+1
+1
+3
+3.00
+4.00
+6.00
+Case 8
+1
+1
+3
+4.00
+1.00
+3.00
+Case 9
+1
+1
+3
+5.00
+7.00
+1.00
+Case 10
+1
+2
+1
+6.00
+5.00
+2.00
+Case 11
+1
+2
+1
+5.00
+4.00
+4.00
+Case 12
+1
+2
+1
+4.00
+6.00
+4.00
+Case 13
+1
+2
+2
+5.00
+3.00
+5.00
+Case 14
+1
+2
+2
+4.00
+3.00
+3.00
+Case 15
+1
+2
+2
+3.00
+4.00
+4.00
+Case 16
+1
+2
+3
+4.00
+1.00
+6.00
+Case 17
+1
+2
+3
+3.00
+2.00
+6.00
+Case 18
+1
+2
+3
+2.00
+6.00
+4.00
+Case 19
+2
+1
+1
+1.00
+4.00
+5.00
+Case 20
+2
+1
+1
+2.00
+5.00
+5.00
+Case 21
+2
+1
+1
+3.00
+5.00
+2.00
+Case 22
+2
+1
+2
+4.00
+8.00
+3.00
+Case 23
+2
+1
+2
+5.00
+5.00
+4.00
+Case 24
+2
+1
+2
+6.00
+4.00
+5.00
+Case 25
+2
+1
+3
+1.00
+3.00
+2.00
+Case 26
+2
+1
+3
+2.00
+3.00
+3.00
+Case 27
+2
+1
+3
+3.00
+5.00
+4.00
+Case 28
+2
+2
+1
+4.00
+2.00
+5.00
+Case 29
+2
+2
+1
+5.00
+4.00
+4.00
+Case 30
+2
+2
+1
+6.00
+6.00
+6.00
+Case 31
+2
+2
+2
+5.00
+4.00
+8.00
+Case 32
+2
+2
+2
+6.00
+5.00
+6.00
+Case 33
+2
+2
+2
+7.00
+3.00
+3.00
+Case 34
+2
+2
+3
+7.00
+3.00
+4.00
+Case 35
+2
+2
+3
+8.00
+4.00
+5.00
+Case 36
+2
+2
+3
+9.00
+1.00
+2.00
+Case 37
+1
+1
+1
+1.00
+3.00
+1.00
+Case 38
+1
+1
+1
+2.00
+1.00
+3.00
+Case 39
+1
+1
+1
+3.00
+4.00
+3.00
+Case 40
+1
+1
+2
+2.00
+6.00
+1.00
+Case 41
+1
+1
+2
+3.00
+5.00
+5.00
+Case 42
+1
+1
+2
+4.00
+3.00
+4.00
+Case 43
+1
+1
+3
+3.00
+4.00
+6.00
+Case 44
+1
+1
+3
+4.00
+1.00
+3.00
+Case 45
+1
+1
+3
+5.00
+7.00
+1.00
+Case 46
+1
+2
+1
+6.00
+5.00
+2.00
+Case 47
+1
+2
+1
+5.00
+4.00
+4.00
+Case 48
+1
+2
+1
+4.00
+6.00
+4.00
+Case 49
+1
+2
+2
+5.00
+3.00
+5.00
+Case 50
+1
+2
+2
+4.00
+3.00
+3.00
+Case 51
+1
+2
+2
+3.00
+4.00
+4.00
+Case 52
+1
+2
+3
+4.00
+1.00
+6.00
+Case 53
+1
+2
+3
+3.00
+2.00
+6.00
+Case 54
+1
+2
+3
+2.00
+6.00
+4.00
+Case 55
+2
+1
+1
+1.00
+4.00
+5.00
+Case 56
+2
+1
+1
+2.00
+5.00
+5.00
+Case 57
+2
+1
+1
+3.00
+5.00
+2.00
+Case 58
+2
+1
+2
+4.00
+8.00
+3.00
+Case 59
+2
+1
+2
+5.00
+5.00
+4.00
+Case 60
+2
+1
+2
+6.00
+4.00
+5.00
+Case 61
+2
+1
+3
+1.00
+3.00
+2.00
+Case 62
+2
+1
+3
+2.00
+3.00
+3.00
+Case 63
+2
+1
+3
+3.00
+5.00
+4.00
+Case 64
+2
+2
+1
+4.00
+2.00
+5.00
+Case 65
+2
+2
+1
+5.00
+4.00
+4.00
+Case 66
+2
+2
+1
+6.00
+6.00
+6.00
+Case 67
+2
+2
+2
+5.00
+4.00
+8.00
+Case 68
+2
+2
+2
+6.00
+5.00
+6.00
+Case 69
+2
+2
+2
+7.00
+3.00
+3.00
+Case 70
+2
+2
+3
+7.00
+3.00
+4.00
+Case 71
+2
+2
+3
+8.00
+4.00
+5.00
+Case 72
+2
+2
+3
+9.00
+1.00
+2.00
diff --git a/applications/lazstats/docs/HelpNDoc/LazStats.hnd b/applications/lazstats/docs/HelpNDoc/LazStats.hnd
index 58cb0056d..68c05666d 100644
Binary files a/applications/lazstats/docs/HelpNDoc/LazStats.hnd and b/applications/lazstats/docs/HelpNDoc/LazStats.hnd differ
diff --git a/applications/lazstats/source/forms/analysis/comparisons/latinsqrsunit.lfm b/applications/lazstats/source/forms/analysis/comparisons/latinsqrsunit.lfm
index b1fef2f17..eb2f38663 100644
--- a/applications/lazstats/source/forms/analysis/comparisons/latinsqrsunit.lfm
+++ b/applications/lazstats/source/forms/analysis/comparisons/latinsqrsunit.lfm
@@ -3,6 +3,8 @@ object LatinSqrsFrm: TLatinSqrsFrm
   Height = 248
   Top = 108
   Width = 523
+  HelpType = htKeyword
+  HelpKeyword = 'LatinandGreco-LatinSquares'
   ActiveControl = Plan
   AutoSize = True
   BorderStyle = bsDialog