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12 questions from this quiz
Categorical data
Continuous data
Separated by gaps
Touching each other
Frequency
Frequency density
Frequency÷Group Width\text{Frequency} \div \text{Group Width}Frequency÷Group Width
222
The area of each bar
Frequency Density×Group Width\text{Frequency Density} \times \text{Group Width}Frequency Density×Group Width
555
To simplify data and see patterns
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