Which of the following scales of measurement has 'True Zero' point?

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UGC NET Paper 2: Education 19th June 2023 Shift 1
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  1. Nominal scale
  2. Ordinal scale
  3. Interval scale
  4. Ratio scale

Answer (Detailed Solution Below)

Option 4 : Ratio scale
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UGC NET Paper 1: Held on 21st August 2024 Shift 1
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Detailed Solution

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The answer is 4) Ratio scale.

Ratio scale:

  • A ratio scale is a measurement scale that has a true zero point. This means that there is no value on the scale that is less than zero.
  • Ratio scales are the most powerful type of measurement scale because they allow for the calculation of meaningful ratios.
  • Nominal scales, ordinal scales, and interval scales do not have true zero points.
  • This means that the values on these scales are arbitrary and cannot be meaningfully compared to each other.

Here is a table that summarizes the different types of measurement scales:

Type of Measurement Scale

Description

Example

Nominal scale

  • The values on the scale are names or labels.
  • Gender (male, female)

Ordinal scale

  • The values on the scale can be ordered from least to greatest.
  • Temperature (hot, warm, cool, cold)

Interval scale

  • The values on the scale can be ordered from least to greatest and the difference between two values is meaningful.
  • Temperature (in degrees Celsius)

Ratio scale

  • The values on the scale can be ordered from least to greatest, the difference between two values is meaningful, and there is a true zero point.
  • Distance (in meters)

Hence, Ratio scale of measurement has 'True Zero' point

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