Final answer:
The median of the data set is 21 and the mean is 26.5.
Step-by-step explanation:
The median of a data set is the middle value when the data is arranged in ascending or descending order. In this case, the data set is: 3, 21, 21, 29, 35, 44. Arranged in ascending order, the median is the third value, which is 21.
The mean of a data set is calculated by finding the sum of all the values and dividing it by the total number of values. In this case, the mean is (44 + 3 + 21 + 35 + 21 + 29) / 6, which equals 26.5.