arrange the data from smallest to the highest number
49 52 52 52 55 55 67 74
the median is between 52 and 55
49 52 52 52 to find Q1, find the median of the first half of the numbers
55 55 67 74 to find Q3, find the median of the second half of the numbers
Q3 the median between 55 and 56. (55+67)/2=122/2=61
Q3=61