A scatter diagram is primarily used to study the:
Correct answer: A. Relationship between two variables
- A. Relationship between two variables
- B. Composition of one total
- C. Trend of one time series
- D. Ranks of several categories
Explanation
A scatter diagram plots paired values to show the direction and strength of association between two variables. It does not by itself prove that one variable causes the other.
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Data collection covers primary and secondary sources, qualitative and quantitative data, discrete and continuous variables, sampling methods and questionnaire design. Presentation includes frequency tables, grouped data, bar charts, histograms, pie charts, line graphs and cumulative frequency curves, with care over class intervals and misleading scales.
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