 
															 1.1 Full Chapter Revision
1.1 Full Chapter Revision 2.1 Full Chapter Revision
2.1 Full Chapter Revision 3.1 Full Chapter Revision
3.1 Full Chapter Revision 4.1 Full Chapter Revision
4.1 Full Chapter Revision 4.2 Unsolved Practicals
4.2 Unsolved Practicals 5.1 Full Chapter Revision
5.1 Full Chapter Revision 5.2 Unsolved Practicals
5.2 Unsolved Practicals 6.1 Full Chapter Revision
6.1 Full Chapter Revision 6.2 Unsolved Practicals
6.2 Unsolved Practicals 7.1 Full Chapter Revision
7.1 Full Chapter Revision 8.1 Full Chapter Revision
8.1 Full Chapter Revision 9.1 Full Chapter Revision
9.1 Full Chapter Revision 10.1 Complete Chapter Explanation
10.1 Complete Chapter Explanation 10.2 Unsolved Practical's - Range
10.2 Unsolved Practical's - Range 10.4 Unsolved Practical's - Quartile Deviation
10.4 Unsolved Practical's - Quartile Deviation  10.5 Mean Deviation - Unsolved Practicals
10.5 Mean Deviation - Unsolved Practicals 10.6 Standard Deviation - Unsolved Practicals
10.6 Standard Deviation - Unsolved Practicals 11.1 Complete Chapter Revision
11.1 Complete Chapter Revision 11.2 Unsolved Practicals - Scatter Diagram
11.2 Unsolved Practicals - Scatter Diagram 11.3 Unsolved Practicals - Karl Pearson's Coefficient Correlation
11.3 Unsolved Practicals - Karl Pearson's Coefficient Correlation 11.4 Unsolved Practicals - Rank Correlation
11.4 Unsolved Practicals - Rank Correlation 12.1 Complete Chapter Revision
12.1 Complete Chapter Revision