Home › IB Diploma › Mathematics › Descriptive Statistics › A value is suspected to be an outlier if it lies…
A value is suspected to be an outlier if it lies beyond the quartiles by more than the IQR times:
A2.5
B3.5
C4.5
D1.5
Answer & Solution
Correct answer: D. 1.5
1. The rule adds a fixed multiple of the spread to each quartile.
2. Anything past that fence needs investigating.
3. The multiplier used is 1.5.
_Source: OpenStax Introductory Statistics 2e, Chapter 2, Descriptive Statistics._
Related questions
A number measuring how far the data are spread from the mean is the standard:A histogram is pulled out towards the low values, so the distribution is described as:The value that appears most often in a data set is the:Fifty weights are added together and the total divided by fifty. The result is the:On a box plot, the two ends of the rectangular box are marked by:A box plot is built from the minimum, maximum, median and the two:The third quartile of a data set is the same as the percentile numbered:The median of a data set is the same as the percentile numbered: