If the first quartile is 6 and the third quartile is 18, what is the semi-interquartile range?
Correct answer: B. 6
- A. 5
- B. 6
- C. 12
- D. 24
Explanation
The semi-interquartile range is half the difference between the third and first quartiles. Thus, it is (18 minus 6) divided by 2, or 6.
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About Measures of Central Tendency and Dispersion
Central tendency includes mean, weighted mean, median and mode for raw and grouped data. Dispersion covers range, quartiles, interquartile range, variance, standard deviation and coefficient of variation, including the effect of changes in scale and the distinction between a representative centre and the spread around it.
Practise Measures of Central Tendency and Dispersion
30 free Measures of Central Tendency and Dispersion MCQs from Quantitative Methods, each with the correct answer and an explanation. Unlimited attempts, no account needed.
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