**Ever wondered about the different ways we measure things?**

Today, we’re diving deep into the “Interval Scale.”

It’s like the difference between knowing the temperature and feeling it. Let’s get started!

**What is Interval Scale?**

An Interval Scale is a measurement scale where the difference between two values is meaningful.

**And above all, zero on this scale doesn’t mean the absence of the quantity**, but rather it’s just another point on the scale.

**Example**

Think of temperature in Celsius. The difference between 10°C and 20°C is **the same** as between 20°C and 30°C.

But 0°C doesn’t mean there’s no temperature; it’s just the freezing point of water.

Other examples:

**IQ Scores**: A person with an IQ of 140 doesn’t necessarily have “twice the intelligence” of someone with an IQ of 70.**SAT Scores**: The difference between scores of 1200 and 1100 is the same as between 1100 and 1000, but you can’t say a score of 1200 is “twice as good” as 600.**Credit Scores**: A score of 800 is better than 700, but not “twice as good”.**Likert Scale in Surveys**: For instance, rating satisfaction from 1-5. The difference between 4 (agree) and 5 (strongly agree) might not be the same as between 2 (disagree) and 3 (neutral).

**Interval Scale vs Ratio Scale**

**Interval Scale**: Has a meaningful difference between values, but zero doesn’t indicate the absence of the quantity. (e.g., Temperature in Celsius)**Ratio Scale**: Similar to interval scale but**with a true zero point**, indicating the absence of the quantity. (e.g., Weight in kilograms)

Imagine a bank balance. In the ratio scale, $0 means you have no money. But in the interval scale, like temperature, 0°C doesn’t mean there’s no warmth!

**Examples of Ratio Scale**

**Age**: A person who is 20 years old is indeed twice as old as someone who is 10 years old.**Height**: A tree that is 10 meters tall is twice as tall as a tree that is 5 meters tall.**Weight**: A package weighing 20 kilograms is twice as heavy as a package weighing 10 kilograms.**Income**: Earning $100,000 a year means you earn twice as much as someone earning $50,000.**Distance**: A 10-kilometer race is twice as long as a 5-kilometer race.