Qualitative observations
Observations that deal with descriptions that cannot be expressed in numbers are called qualitative observations.
Qualitative (quantitative are observations that can be expressed numerically)
qualitive
When observations deal with amounts or numbers, they are called quantitative observations. These observations involve measurable data that can be expressed numerically, allowing for statistical analysis and comparisons. Quantitative observations are essential in scientific research as they provide objective evidence that can be replicated and verified.
Data that can't be expressed in numbers is called qualitative data, which includes descriptions and observations. Color, texture, emotions, and shape are examples of qualitative data.
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Numbers that can be expressed as a ratio are called rational numbers.
They are called rational numbers that can be expressed as fractions
They are called irrational numbers; numbers that can be expressed as a ratio of integers are called rational numbers. Some common irrational numbers are pi (3.14159...) and the square root of two.
All rational numbers can be expressed as fractions whereas irrational numbers can't be expressed as fractions.
Numbers expressed using exponents are called powers. When writing a number expressed as an exponent, the number is called the base. For example, in 23 two is the base.
Such numbers are called rational numbers.