The median is 562.
Work Step by Step
Arrange the numbers from smallest to largest. 151, 525, 542, 559, 565, 576, 578, 590 There are 8 numbers listed, so the mid;point of the list is between the 4th and 5th numbers. The median is the average of the 4th and 5th numbers. $m=(559+565)\div2=1124\div2=562$