70°
Step-by-step explanation:
To find the median, we first order the data from least to greatest:
44, 54, 55, 55, 55, 56, 64, 65, 68, 72, 78, 79, 81, 81, 82, 84, 88, 88
Next we find the middle value. This is between 68 and 72; we average these to find the median:
(68+72)/2 = 140/2 = 70