ABM: Concepts and Practice · Part A: Statistics

Chapter 1: Data and sampling

Where a bank’s numbers come from, how they are arranged, and why a few hundred accounts can speak for a few lakh.

Buyers of the e-book, or of the print copy, which includes it, read the whole chapter. Everyone can read the free sample, pages 1 to 24 of the e-book.

In this chapter

• 1.1What statistics isp. 3
• 1.2Collecting and classifying datap. 4
• 1.3Frequency distributionsp. 5
• 1.4Sampling methodsp. 6
• 1.5Standard error and the CLTp. 7
• Exam traps and quick checksp. 8
• Practice: 16 questions in three roundsp. 9
• Answers, with every wrong option explainedp. 11
• Make it stickp. 13
• Chapter 1 on one pagep. 14

Corrections and updates

None for this chapter so far. Every correction to the book, and any rule that changes after its date, is listed on the errata page.