In order to get the mean, sum all the 20 values and divide the result by 20, the rounded mean is 0.30.
The mode is the most frequent number or numbers, therefore, the mode is 0.286.
In order to get the median, the data must be ordered, then we choose the middle value, in this case, there are 20 values, then select the tenth and the eleventh, sum them and divide the result by 2, then the median is 0.291.