class interval: meaning, definition, pronunciation and examples
C2Formal, Technical, Academic
Quick answer
What does “class interval” mean?
In statistics, a range of values used to group data points for frequency distribution analysis.
Audio
Pronunciation
Definition
Meaning and Definition
In statistics, a range of values used to group data points for frequency distribution analysis.
A predefined span of numerical values (e.g., 10-19, 20-29) that organizes raw data into manageable categories for creating histograms, frequency tables, or statistical summaries.
Dialectal Variation
British vs American Usage
Differences
No significant differences in meaning or usage. Both regions use identical terminology in statistical contexts.
Connotations
Technical/neutral in both varieties.
Frequency
Equally low-frequency in specialized academic/professional contexts in both regions.
Grammar
How to Use “class interval” in a Sentence
The class interval [ranges from X to Y]A class interval of [number] unitsGroup the data into class intervalsVocabulary
Collocations
Usage
Meaning in Context
Business
Used in market research reports to group customer age or income data (e.g., 'We analysed sales by income class intervals of £10,000').
Academic
Fundamental concept in statistics courses for creating frequency distributions and histograms.
Everyday
Virtually never used in everyday conversation.
Technical
Core term in data science, statistics, and research methodology for data discretization.
Watch out
Common Mistakes When Using “class interval”
- Using 'class interval' to refer to a time period between lessons (that's a 'break' or 'interval').
- Confusing it with 'confidence interval' (a different statistical concept).
FAQ
Frequently Asked Questions
In statistics and data visualization (e.g., histograms), the terms are often used interchangeably. 'Bin' is more common in computing contexts.
The choice depends on your data's range and the desired detail. Common methods include using a formula (like Sturges' rule), ensuring intervals are equal in width, and having enough intervals to show pattern but not so many that the table becomes confusing.
Extremely rarely. Its meaning is firmly fixed in statistical data grouping. In other contexts, people use 'range', 'bracket', or simply 'interval'.
It is the value exactly in the middle of the interval's upper and lower bounds, often used to represent the entire interval in calculations.
In statistics, a range of values used to group data points for frequency distribution analysis.
Class interval is usually formal, technical, academic in register.
Class interval: in British English it is pronounced /klɑːs ˈɪntəv(ə)l/, and in American English it is pronounced /klæs ˈɪntərvəl/. Tap the audio buttons above to hear it.
Learning
Memory Aids
Mnemonic
Imagine a SCHOOL CLASS (class) where students are grouped by TEST SCORE RANGES (interval) instead of by name.
Conceptual Metaphor
DATA ORGANIZATION IS SORTING INTO BOXES (class intervals are the labelled boxes).
Practice
Quiz
What is the primary purpose of a class interval?