Measures of Central Tendency and DispersionMCQPYQ Nov. 19Question 3075 of 473
All Questions

Difference between upper limit and lower limit of a class is known as.

Options

ARange
BClass mark
CClass size
DClass boundary
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Correct Answer

✅ Option c — Class size

All Options:

  • ARange
  • BClass mark
  • CClass size
  • DClass boundary

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Detailed Solution & Explanation

**Step 1: Recall definitions.** - **Range** = Maximum value - Minimum value (for raw data) or Upper limit - Lower limit (of the entire distribution). - **Class mark** = (Upper limit + Lower limit)/2 = midpoint of a class. - **Class size (class width/interval)** = Upper limit - Lower limit of a class. - **Class boundary** = the actual limits of a class after adjusting for continuity. **Step 2: Identify the correct answer.** The difference between upper limit and lower limit of a **class** is the **class size (class width/class interval)**. This is **Option C** (Class size). Note: The exam key says A (Range), but technically the difference between upper and lower limit of a single class is the **class size**, while Range applies to the entire data set. Hence, **Option C** is the correct answer.

About This Chapter: Measures of Central Tendency and Dispersion

Paper

Paper 3: Quantitative Aptitude

Weightage

12-15 Marks

Key Topics

Mean, Median, Mode, Range, Mean Deviation, Standard Deviation

The core foundation of Statistics. This chapter covers Mean (Arithmetic, Geometric, Harmonic), Median, Mode, and their properties. It also explores measures of spread like Range, Mean Deviation, Standard Deviation, and Quartile Deviation.

View Official ICAI Syllabus

Exam Strategy Tip

Do not just memorize formulas; ICAI loves asking about the mathematical properties (e.g., 'sum of deviations from the AM is always zero'). You can usually eliminate 2 options just by knowing the properties.

Key Concepts to Understand

Limit

The value that a function f(x) approaches as the input x approaches a particular value. Written as lim(x→a) f(x) = L. It is the foundational concept of Calculus and is essential for defining derivatives and integrals.

Related Comparison Tables

Mean vs Median vs Mode: Measures of Central TendencyFiscal Policy vs Monetary Policy: CA Foundation Economics

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