To find the mean add up all the values and divide by the number of values (12)
Order the 12 values from smallest to largest:
0.10 0.13 0.14 0.16 0.16 0.16 0.18 0.18 0.23 0.23 0.26 0.30
If any of the values occur more than once, then the value(s) that occur the most often is (are) the mode.
The median is the average of the 6th and 7th values in the above ordering.
Which value(s) that the median is (are) computed from is determined using the formula;
value # = (n+1)/2, where here n = 12. Here value # = 6.5. Because it is not a whole number the median is computed as the average of the 6th and 7th values.