Presentation of Data

Gujarat Board · Class 11 · Statistics

Quick revision notes for Presentation of Data — Gujarat Board Class 11 Statistics. Key concepts, formulas, and definitions for last-minute revision.

44 questions24 flashcards5 concepts

Key Topics to Revise

2.1 Classification - Meaning and Necessity

Classification is the process of arranging ungrouped or raw data into proper systematic form
Raw data are in haphazard form making statistical analysis difficult
Discrete variable: can assume definite or countable values (e.g., number of children, accidents)

2.2 Types of Classification

Two main types: Classification of quantitative data and qualitative data
Quantitative classification creates frequency distributions
Qualitative classification creates tabulation of attributes

2.2.1.3 Cumulative Frequency Distribution

Cumulative frequency (cf) = sum of frequencies up to a particular value/class
'Less than' type: frequencies up to specified value (ascending cumulative)
'More than' type: frequencies from specified value onwards (descending cumulative)

2.3 Tabulation - Types and Uses

Tabulation is systematic arrangement of classified data in rows and columns
Simple table: based on single characteristic
Complex table: based on multiple characteristics

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Full Notes

Key Concepts

The process of arranging rawDiscrete variables assume definite or countableA table showing various valuesShows the sum of frequencies upThe systematic arrangement of classified data

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Sources & Official References

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