Answer
(a) not bimodal
(b) not bimodal
(c) is bimodal (the 2 mades are 14 and 18)
Work Step by Step
The mode is the most frequently occurring data value. A bimodal distribution has 2 modes.
Here are the data in ascending order:
(a) 9, 9, 9, 10, 11, 12, 13, 14, 16, 20
(b) 6, 7, 12, 16, 17, 19, 19, 19, 21, 23
(c) 6, 14, 14, 14, 16, 17, 18, 18, 18, 28