In which scale of measurement, classification, order and equality of units are ensured?

Nominal scale

• When a value has two or more sub-categories it can be measure in nominal scale
• Nominal means where the name of the variable considers only

• Classification only

In an application form, you have to select your gender

Ordinal scale

• It is also known as the ranking scale
• It measures quantitative and qualitative variables
• There the measurements usually done dividing the data into classes or in absolute value
• It is not necessary that the interval between two class should be equal
• Classification and order

The income group can be divided into three

• Lower-income group
• Middle-income group
• Higher-income group

It can also be measured based on the annual family income like 150000/annum

Interval scale

• It has quite similar to the ordinal scale
• Interval scale refers to the level of measurement in which the attributes composing variables are measured on specific numerical scores or values
• There are equal distances between attributes.
• The distance between any two adjacent attributes is called an interval, and intervals are always equal.
• The scale attached with a thermometer is a kind of interval scale

• Classification, order, and equal unit

• Likert Scale
• Net Promoter Score (NPS)
• Bipolar Matrix Table

Ratio scale

• The ratio scale of measurement is similar to the interval scale in that it also represents the quantity and has equality of units.
• However, this scale also has an absolute zero (no numbers exist below zero).
• It indicates differences between two variable, their amount of differences, and the direction of differences

• Classification, order, equal unit, and zero

What is the weight of an iron rod in Kgs?

• 0 - 5 kgs
• 5 – 10 kgs
• 10 – 15 kgs
• 15 – 20 kgs
• More than 20 kgs