Question

Identify the incorrect statement in the context of measures of variability:

• A. Range is the difference between maximum and minimum values of the data.
• B. Mean is the average of numeric values of an attribute.
• C. Standard deviation refers to differences within the set of data of a variable.
• D. Measures of variability is also known as measures of dispersion.

Hint:

Always distinguish between central tendency (Mean, Median, Mode) and variability (Range, Variance, Standard Deviation).

Answer 1

The Correct Option is B

Step 1: Recall definitions.
- Range: Difference between maximum and minimum values → Correct.
- Mean: Represents central tendency, not a measure of variability → Incorrect.
- Standard Deviation: Measures how data points differ from the mean (a measure of variability) → Correct.
- Variability/Dispersion: Both terms refer to spread of data → Correct.

Step 2: Conclusion.
The incorrect statement is that Mean is a measure of variability. Mean is a measure of central tendency, not dispersion.
Final Answer: \[ \boxed{\text{Mean is the average of numeric values of an attribute.}} \]