Answer
mode
Work Step by Step
Arrange the values in order:
$1.8$ ;$2.0$ ;$2.1$ ;$2.3$ ;$2.4$ ;$2.6$; $3.8$ ;$4.2$ ;$4.2$; $15.1$
To find the mode, find the expression that is repeated most often.
Hence, the mode of the data set: $4.2$
The mode of this data set is 4.2 in.