Q1: 149
Q3: 189
First we have to put the data in numerical order
141, 149, 152, 155, 189, 290
Q1 is the middle of the bottom half of the data, 149, and Q3 is the middle of the top half of the data, 189
In case there are follow ups: the median is 153.5, and the IQR is 40
