If a category has frequency 18 in a total of 120 observations, its relative frequency is:
Correct answer: B. 0.15
- A. 0.015
- B. 0.15
- C. 1.5
- D. 15.0
Explanation
Relative frequency equals the category frequency divided by the total frequency: 18 divided by 120 equals 0.15. Expressed as a percentage, this is 15 percent.
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About Data Collection and Presentation
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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