The Quick Answer for Plural of Analysis:

The plural of analysis is analyses

When to Use Analysis?

Analysis is the word’s singular form, meaning that it refers to a single study, examination, report, etc.

  • His analysis is in many ways highly persuasive
  • I agree with his analysis of the situation.
  • To illustrate my point of view I have done a comparative analysis.

When to Use Analyses?

Analyses is plural for analysis, the meaning refers to multiple studies, reports, examinations, etc.

  • The three analyses are combined in a matrix as shown in the Table.
  • The analyses covered a variety of diagnostic groups, age groups, and periods.

See Also
Punctuation Marks in English
Definite and Indefinite Articles (a, an, the)