alleryStart learning →A data set has a first quartile of 12 and a third quartile of 30. What is the interquartile range?
A42
B21
C15
D18
Answer & Solution
Correct answer: D. 18
1. The interquartile range is the third quartile minus the first quartile.
2. Here that is 30 minus 12.
3. So the interquartile range is 18.
4. Adding the two quartiles gives 42, which is the trap in the second option.
_Source: OpenStax High School Statistics (CC BY 4.0), Ch 2 "Descriptive Statistics" and Ch 3 "Probability Topics", section 2.3 Measures of the Location of the Data_
Keep practising Descriptive Statistics
Browse all Descriptive Statistics questions for CBEST, or explore more Mathematics topics.
Related questions
Key in the summary numbersFill the gaps in the center ruleLine up three of one kindTwenty-nine ages are listed in order. The position for the 70th percentile is 0.70 multiplA data set has a mean of 5 and a standard deviation of 2. Which value sits 1.5 standard deFor a set of values the mean is 6.3, the median is 6.5 and the mode is 7. Which way is theTen letter counts are 4, 5, 6, 6, 6, 7, 7, 7, 7 and 8. What is the mean?Fourteen values in order are 1, 1, 2, 2, 4, 6, 6.8, 7.2, 8, 8.3, 9, 10, 10 and 11.5. What