goodness of fit: meaning, definition, pronunciation and examples
C1Academic/Technical
Quick answer
What does “goodness of fit” mean?
A statistical measure that assesses how well observed data match a theoretical model or distribution.
Audio
Pronunciation
Definition
Meaning and Definition
A statistical measure that assesses how well observed data match a theoretical model or distribution.
In broader usage, the degree to which something (a person, idea, object) is suitable or appropriate for a given context or purpose.
Dialectal Variation
British vs American Usage
Differences
No significant lexical or syntactic differences; term is identical in both varieties.
Connotations
Highly technical in both varieties; American usage may be more prevalent due to larger social science publishing output.
Frequency
Moderately frequent in academic/professional publications in both varieties; rare in everyday speech.
Grammar
How to Use “goodness of fit” in a Sentence
The goodness of fit [of something] [to/for something]A goodness-of-fit testTo assess/evaluate/calculate the goodness of fitVocabulary
Collocations
Examples
Examples of “goodness of fit” in a Sentence
verb
British English
- The data were fitted to the model, and its goodness of fit was assessed.
- We need to fit the model first, then check its goodness of fit.
American English
- They fitted the distribution, then evaluated the goodness of fit.
- After fitting the curve, report the goodness of fit.
adverb
British English
- The model performed goodness-of-fit-wise quite poorly.
- (Extremely rare adverbial use)
American English
- (Adverbial use is not standard for this noun phrase.)
adjective
British English
- The goodness-of-fit indices were all within acceptable limits.
- She conducted a goodness-of-fit analysis.
American English
- The goodness-of-fit statistic was significant.
- We reviewed the goodness-of-fit criteria.
Usage
Meaning in Context
Business
Rare. Possibly in data analytics contexts: 'We ran a goodness-of-fit test on the sales forecast model.'
Academic
Common in statistics, psychology, social sciences, biology: 'The chi-square goodness of fit rejected the null hypothesis.'
Everyday
Very rare. Metaphorical: 'The goodness of fit between his skills and the job requirements was perfect.'
Technical
Core usage. Refers to specific statistical procedures and metrics for evaluating models.
Vocabulary
Synonyms of “goodness of fit”
Vocabulary
Antonyms of “goodness of fit”
Watch out
Common Mistakes When Using “goodness of fit”
- Using it as a plural ('goodnesses of fit'), using incorrect prepositions ('goodness of fit with the model' - better: 'of the model'), confusing it with 'correlation'.
FAQ
Frequently Asked Questions
It is typically not hyphenated when used as a noun phrase ('assess the goodness of fit'). Hyphens are used when it functions as a compound modifier before a noun ('a goodness-of-fit test').
It is a technical term. In everyday contexts, simpler phrases like 'how well it fits', 'suitability', or 'compatibility' are more natural.
The chi-square (χ²) goodness-of-fit test is one of the most common, used for categorical data.
Primarily, yes. However, it can be used metaphorically in other fields (e.g., psychology, management) to describe the match between a person and an environment or role.
A statistical measure that assesses how well observed data match a theoretical model or distribution.
Goodness of fit is usually academic/technical in register.
Goodness of fit: in British English it is pronounced /ˌɡʊdnəs əv ˈfɪt/, and in American English it is pronounced /ˌɡʊdnəs əv ˈfɪt/. Tap the audio buttons above to hear it.
Phrases
Idioms & Phrases
- “Not applicable”
Learning
Memory Aids
Mnemonic
Think of trying on clothes: a 'good fit' means the clothes match your body well. 'Goodness of fit' is how well data 'fits' a model.
Conceptual Metaphor
MODELS ARE GARMENTS (data must 'fit' them well).
Practice
Quiz
In which field is the term 'goodness of fit' most precisely and frequently used?