(i) The given data is 14, 25, 14, 28, 18, 17, 18, 14, 23, 22, 14 and 18.
Make the following frequency table.
Here occurs maximum number of times (that is 4). Hence, the modal value is 14.
(ii) The given data is 7, 9, 12, 13, 7, 12, 15, 7, 12, 7, 25, 18 and 7.
Make the following frequency table.
Since the value 7 occurs maximum number of times, that is, 5. Hence, the modal value is 7.