# Use of Statistical Tools Notes, Class 11 Economics | SwaVid Use of Statistical Tools, NCERT Class 11 Economics: notes with key ideas, definitions, common mistakes and 3 quick checks with worked answers. Canonical: https://www.swavid.com/cbse/class-11/economics/chapter/use-of-statistical-tools Source: https://www.swavid.com/cbse/class-11/economics/chapter/use-of-statistical-tools # Use of Statistical Tools ## Definitions, formats and formulas ## Key ideas ## Common mistakes ## Quick checks ## Keep going ## Questions parents ask ## Class 11 Economics on SwaVid ### Need for statistical tools ### Steps in a project ### Data collection and presentation ### Analysis of data ### Interpretation and conclusion ### Related chapter ### Related chapter ### Related chapter ### All chapters SwaVid › CBSE › Class 11 › Economics › Use of Statistical Tools Notes written by SwaVid from the NCERT textbook. Class 11 Economics, Chapter 8. Key ideas, definitions and common mistakes. CBSE does not print marks for a single chapter. Short answer. This chapter shows how to combine different statistical methods to carry out an economic project or study. It guides students through selecting a problem, gathering data, and drawing meaningful conclusions using statistical tools. Source: NCERT Statistics for Economics (Reprint 2026-27) , Chapter 8, Use of Statistical Tools Statistical tools are needed to make sense of raw economic facts. They help analyse real-world issues such as poverty, unemployment, and price changes systematically. A statistical project begins with identifying a clear problem or objective. This is followed by collection, organisation, presentation, analysis, and interpretation of data. Data can be primary, collected directly via questionnaires or interviews, or secondary from published sources. Tables, bar diagrams, and pie charts are used to present the findings clearly. Measures of central tendency like the mean or median provide representative values. Correlation coefficients help examine relationships between two different economic variables. The final stage involves explaining what the analysed figures mean in the context of the problem. A concluding report outlines findings, limitations, and possible policy suggestions. Try each question first. Then tap it to see the answer. Sum of expenditure = 4000 + 5000 + 4500 + 6000 + 5500 = 25000 Number of households n = 5 Mean = 25000 / 5 = 5000 ₹ 5000 r = 48 / (√64 × √36) r = 48 / (8 × 6) = 48 / 48 = 1 1 Arrange in ascending order: 12, 15, 18, 20, 25 n = 5, so median position = (5 + 1) / 2 = 3rd item 3rd item = 18 18 marks Collection of Data . Presentation of Data . Measures of Central Tendency . The 13 chapters of Class 11 Economics . CBSE does not give marks to one chapter. It prints marks for units or parts, and the chapter list page shows them all. No. They are written by SwaVid from the NCERT textbook. The CBSE curriculum is the reference for what is assessed. Introduction. SwaVid is an AI tutor for Indian students in Classes 6 to 12. It finds the earlier ideas a child missed, then teaches today’s chapter. Start free to see how it works. - Ch 8 NCERT book - 80 marks, theory paper - 3 quick checks - Using statistical tools without defining clear objectives . Always state the exact objective of the study first. Statistical tools are selected based on the questions being investigated. - Confusing correlation with causation in interpretation . A high correlation between two variables does not prove that one causes the other. Explain the relationship carefully without assuming direct cause and effect. - Treating the conclusion as just a repetition of tables . Interpret what the numbers signify for the real-world problem rather than simply re-reading the numbers from the tables. ## Key Links - [CBSE](https://www.swavid.com/cbse) - [Class 11](https://www.swavid.com/cbse/class-11) - [Economics](https://www.swavid.com/cbse/class-11/economics/chapters) - [Start free →](https://www.swavid.com/signup) - [All 13 chapters](https://www.swavid.com/cbse/class-11/economics/chapters) - [NCERT Statistics for Economics (Reprint 2026-27)](https://ncert.nic.in/textbook.php) - [Open notes](https://www.swavid.com/cbse/class-11/economics/chapter/collection-of-data) - [Open notes](https://www.swavid.com/cbse/class-11/economics/chapter/presentation-of-data) - [Open notes](https://www.swavid.com/cbse/class-11/economics/chapter/measures-of-central-tendency) - [Class 11 Economics](https://www.swavid.com/cbse/class-11/economics/chapters) - [Start free →](https://www.swavid.com/signup)